Rogers Clark Ballard Morton (September 19, 1914 - April 19, 1979) was an American politician who served as the U.S. Secretary of the Interior and Secretary of Commerce during the administrations of Presidents Richard M. Nixon and Gerald R. Ford, Jr., respectively. He also served as a member of the U.S. House of Representatives from Maryland. Though he was born in Louisville, Kentucky, Morton moved to a farm on the Eastern Shore of Maryland in the early 1950s. In 1962, he was elected to the House of Representatives, in which capacity he established an environmental record.

In 1947, Morton spent a great deal of time helping his brother Thruston in his ultimately successful campaign for election to the House of Representatives in Kentucky. After this initial exposure to politics, Morton moved to the Eastern Shore of Maryland in the early 1950s, where he set up a 1,400 acres (5.7 km2) cattle farm along the Wye River in Talbot County. In 1962, Morton decided to challenge Democratic incumbent Thomas Francis Johnson of Maryland's 1st congressional district. Johnson, who was reeling from a political scandal, lost to Morton in the general election. Morton was lauded for not making Johnson's legal troubles his primary campaign issue.  Morton was re-elected to Congress four more times, and served from 1963 until 1971. In Congress, Morton worked to enact legislation that would preserve the Chesapeake Bay, including laws reducing pollution into the Bay, working for the creation of a national park on Assateague Island, and providing funds to the Army Corps of Engineers to model how the Bay functions as an estuary. Concerning civil rights, Morton voted for the Civil Rights Act of 1964, but not the Act of 1968.  During the 1968 Republican National Convention, Morton served as the floor manager for eventual presidential nominee Richard Nixon. Morton also delivered the speech nominating Spiro Agnew, then-Governor of Maryland, as the vice presidential candidate.  Due to his role in Nixon's election campaign and his environmental advocacy, Morton expected to be appointed as Secretary of the Interior in 1969. However, he was passed over for the position in favor of a westerner. He had also been considered for Nixon's vice presidential running mate, but lost out to Agnew. In January 1969, to recognize his efforts, Nixon appointed Morton as chairman of the Republican National Committee. As chairman, Morton was granted ex officio Cabinet rank by Nixon, an unprecedented practice that ultimately continued through the administration of Gerald Ford.

Using a quote from the above article, answer the following question: When did he begin his congressional career?
Morton moved to the Eastern Shore of Maryland in the early 1950s,