Answer by taking a quote from the following article:

Huey Pierce Long Jr. (August 30, 1893 - September 10, 1935), self-nicknamed The Kingfish, was an American politician who served as the 40th governor of Louisiana from 1928 to 1932 and as a member of the United States Senate from 1932 until his assassination in 1935. As the political leader of Louisiana, he commanded wide networks of supporters and was willing to take forceful action. He established the long-term political prominence of the Long family. A Democrat and an outspoken populist, Long denounced the wealthy elites and the banks.

Once in office as governor on May 21, 1928, Long moved quickly to consolidate his power, firing hundreds of opponents in the state bureaucracy, at all ranks from cabinet-level heads of departments and board members to rank-and-file civil servants and state road workers. Like previous governors, he filled the vacancies with patronage appointments from his own network of political supporters. Every state employee who depended on Long for a job was expected to pay a portion of his or her salary at election time directly into Long's political war-chest, which raised $50,000 to $75,000 (equivalent to about $700,000 to $1,000,000 in 2013 dollars) each election cycle. The funds were kept in a famous locked "deduct box" to be used at Long's discretion for political and personal purposes. The American historian David Kennedy wrote that the extremely authoritarian regime Long established in Louisiana was "... the closest thing to a dictatorship that America has ever known".  Once his control over the state's political apparatus was strengthened, Long pushed a number of bills through the 1929 session of the Louisiana State Legislature to fulfill campaign promises. These included a free textbook program for schoolchildren, an idea advanced by John Sparks Patton, the Claiborne Parish school superintendent, and the Long confidant, Representative Harley Bozeman of Winnfield. Long also supported night courses for adult literacy (which taught 100,000 adults to read by the end of his term), and a supply of cheap natural gas for the city of New Orleans.  Long began an unprecedented public works program, building roads, bridges, hospitals, and educational institutions. Huey P. Long's reign of legislation brought textbooks, a highway, natural gas heating to New Orleans, and buildings still standing at LSU. His bills met opposition from many legislators, wealthy citizens, and the media, but Long used aggressive tactics to ensure passage of the legislation he favored. He would show up unannounced on the floor of both the House and Senate or in House committees, corralling reluctant representatives and state senators and bullying opponents. These tactics were unprecedented, but they resulted in the passage of most of Long's legislative agenda. By delivering on his campaign promises, Long achieved hero status among the state's rural poor population.  When Long secured passage of his free textbook program, the school board of Caddo Parish, home of conservative Shreveport, sued to prevent the books from being distributed, saying it would not accept "charity" from the state. Long responded by withholding authorization for locating an Army Air Corps base nearby until the parish accepted the books.  In the 1930 legislative session, Long proposed another major road-building initiative as well as the construction of a new capitol building in Baton Rouge. The State Legislature defeated the bond issue necessary to build the roads, and his other initiatives failed as well.  Long responded by suddenly announcing his intention to run for the U.S. Senate in the Democratic primary of September 9, 1930. He portrayed his campaign as a referendum on his programs: if he won he would take it as a sign that the public supported his programs over the opposition of the legislature, and if he lost he promised to resign. Long defeated incumbent Senator Joseph E. Ransdell, an Alexandria native from Lake Providence in East Carroll Parish, by 149,640 (57.3 percent) to 111,451 (42.7 percent).  Although his Senate term began on March 4, 1931, Long completed most of his four-year term as governor, which did not end until May 1932. He declared that leaving the seat vacant for so long would not hurt Louisiana; "with Ransdell as Senator, the seat was vacant anyway." By not leaving the governor's mansion until January 25, 1932, Long prevented Lieutenant Governor Paul N. Cyr, a former ally, from succeeding to the office. A dentist and geologist from Jeanerette in Iberia Parish, Cyr had subsequently broken with Long and been threatening to roll back his reforms if he succeeded to the governorship. In his autobiography, Long recalled:  On another occasion the greatest publicity was given to a charge made by Lieutenant Governor Cyr that I had performed a swindle worse than that of Teapot Dome in the execution of an oil lease ... The oil lease in question had been made by Governor Parker, and no act had been taken by me, except to permit the holder to enter into a drilling contract. Our reply was practically buried by most of the newspapers.  Long continued to maintain effective control of Louisiana while he was a senator, blurring the boundary between federal and state politics. Though he had no constitutional authority to do so, Long continued to draft and press bills through the Louisiana State Legislature, which remained in the hands of his allies. He made frequent trips to Baton Rouge to pressure the Legislature into enacting his legislation. The program included new consumer taxes, elimination of the poll tax, a homestead tax exemption, and increases in the number of state employees. While physically in Louisiana, Long customarily stayed at the Roosevelt Hotel in New Orleans, where he was fond of the Sazerac Bar (see Peychaud's Bitters). According to Thomas M. Mahne in the New Orleans Times-Picayune, Long had a personal interest in seeing to the quick construction of Airline Highway (US 61) between Baton Rouge and New Orleans as the new road cut 40 miles from the trip.  Long's loyal lieutenant, Governor Oscar K. Allen, dutifully enacted Long's policies. Long berated the governor in public and took over the governor's office in the State Capitol when visiting Baton Rouge. On occasion, he even entered the legislative chambers, going so far as to sit on representatives' and senators' desks and sternly lecture them on his positions. He also retaliated against those who voted against him and used patronage and state funding (especially highways) to maneuver Louisiana toward what opponents called a Long "dictatorship". Having broken a second time after earlier reconciliation with the Old Regulars and Mayor Walmsley in the fall of 1933, Long inserted himself into the New Orleans mayoral election of 1934. A second rift hence developed with the city government that lasted even until after Long's assassination.  In 1934, Long and James A. Noe, an independent oilman and member of the Louisiana Senate from Ouachita Parish, formed the controversial Win or Lose Oil Company. The firm was established to obtain leases on state-owned lands so that its directors might collect bonuses and sublease the mineral rights to the major oil companies. Although ruled legal, these activities were done in secret, and the stockholders were unknown to the public. Long made a profit on the bonuses and the resale of those state leases and used the funds primarily for political purposes.  By 1934, Long began a reorganization of the state government that reduced the authority of local governments in anti-Long strongholds New Orleans, Baton Rouge, and Alexandria. It further gave the governor the power to appoint all state employees. Long passed what he called "a tax on lying" and a 2 percent tax on newspaper advertising revenue. He created the Bureau of Criminal Identification, a special force of plainclothes police answerable only to the governor. He also had the legislature enact the same tax on refined oil that in 1929 had nearly led to his impeachment, which he used as a bargaining chip to promote oil drilling in Louisiana. After Standard Oil agreed that 80 percent of the oil sent to its refineries would be drilled in Louisiana, Long's government refunded most of these tax revenues.

how did he finally leave he governor's mansion?