Answer the question at the end by quoting:

Daniel Robert Graham (born November 9, 1936) is an American politician and author. A member of the Democratic Party, he was the 38th governor of Florida from 1979 to 1987 and a United States Senator from 1987 to 2005. Born in Coral Gables, Florida, Graham won election to the Florida Legislature after graduating from Harvard Law School. After serving in both houses of the Florida Legislature, Graham won the 1978 Florida gubernatorial election, and was reelected in 1982.
Graham was then elected to the U.S. Senate in 1986, defeating incumbent Sen. Paula Hawkins 55 to 45 percent. He was reelected in 1992 (over Bill Grant, 66%-34%) and 1998 (over Charlie Crist, 63%-37%) and chose not to seek reelection in 2004. Upon retiring from the Senate in January 2005, Graham had served 38 consecutive years in public office.  During his 18 years in the Senate, Graham served on the environment and finance committees, and was a founding member of the Democratic Leadership Council. He was also active on veteran's issues and foreign policy, including chairing the US-Spain Council, for which he received the highest civilian recognition for a non-Spaniard by King Juan Carlos.  Graham served 10 years on the Senate Intelligence Committee, which he chaired during and after 9/11 and the run-up to the Iraq war. He led the joint congressional investigation into 9/11. As Chairman of the Senate Intelligence Committee, Graham opposed the War in Iraq and was one of the 23 Senators who voted against President Bush's request for authorization of the use of military force. After meeting with military leaders in February 2002, and requesting and reviewing a National Intelligence Estimate, he said he "felt we were being manipulated and that the result was going to distract us from where our real enemies were". He continued to oppose the Iraq War, saying in 2008: "I'm afraid I never wavered from my belief that this was a distraction that was going to come to a bad end in Iraq and an even worse end in Afghanistan"  In 2004 Graham published Intelligence Matters: The CIA, the FBI, Saudi Arabia and the Failure of America's War on Terror. In September 2008 the book was released in paperback with a new preface and postscript.  Graham has a well-known habit of meticulously logging his daily activities (some as mundane as when he ate a tuna sandwich or rewound a tape of Ace Ventura) on color-coded notebooks, which some say may have cost him a spot on past vice-presidential tickets. The notebooks are now housed at the University of Florida library. A great advocate for his home state, Graham always kept Florida orange juice on hand in his Senate office and was rarely seen without his trademark Florida tie.

How was Bob Graham as a U.S. Senator?

Graham was then elected to the U.S. Senate

IN: According to most sources, Omar was born sometime between 1950 and 1962 in a village in Kandahar Province, Kingdom of Afghanistan (in present-day Kandahar Province or Uruzgan Province). Some suggest his birth year as 1950 or 1953, or as late as around 1966. According to a "surprise biography" published by the Taliban in April 2015, he was born in 1960. His exact place of birth is also uncertain; one possibility is a village called Nodeh near the city of Kandahar.

On 29 July 2015, the Afghan government publicly announced that Mohammed Omar had died in 2013. Pakistani newspaper The Express Tribune reported that a former Afghan Taliban minister and current leadership council member, who spoke on condition of anonymity, said Mullah Omar died from tuberculosis. It was confirmed by a senior Taliban member that Omar's death was kept a secret for two years. It is alleged that Omar was "buried somewhere near the border on the Afghan side". The place of Omar's death is disputed; according to Afghan government sources, he died in a hospital in Karachi, Pakistan. A former Taliban minister stated that Karachi was "Omar's natural destination because he had lived there for quite some time and was as familiar with the city as any other resident." However, this claim has been dismissed by other Taliban members, stating that his death occurred in Afghanistan after his health condition had deteriorated due to "sickness" and that "not for a single day did he go to Pakistan". According to an official statement by Pakistani defence minister Khawaja Asif, "Mullah Omar neither died nor was buried in Pakistan and his sons' statements are on record to support this. Whether he died now or two years ago is another controversy which we do not wish to be a part of. He was neither in Karachi nor in Quetta." Initially, some Taliban members denied that he had died. Other sources considered the report to be speculative, designed to destabilise peace negotiations in Pakistan between the Afghan government and the Taliban. Abdul Hassib Seddiqi, the spokesman for Afghanistan's National Directorate of Security (NDS), said: "We confirm officially that he is dead."  The following day, the Taliban confirmed the death of Omar. Sources close to the Taliban leadership said his deputy, Mullah Akhtar Mansour, would replace him, although with the lesser title of Supreme Leader. Omar's eldest son, Mullah Mohammad Yaqoob, was opposed to Mansour's ascension as leader.  The Taliban splinter group Fidai Mahaz claimed Omar did not die of natural causes but was instead assassinated in a coup led by Mullah Akhtar Mansour and Mullah Gul Agha. The Taliban commander, Mullah Mansoor Dadullah, brother of former senior commander Mullah Dadullah, confirmed that Omar had been assassinated. The leader of Fidai Mahaz, Mullah Najibullah, revealed that due to Omar's kidney disease, he needed medicine. According to Najibullah, Mansour poisoned the medicine, damaging Omar's liver and causing him to grow weaker. When Omar summoned Mansour and other members of Omar's inner circle to hear his will, they discovered that Mansour was not to assume leadership of the Taliban. It was due to Mansour allegedly orchestrating "dishonourable deals." When Mansour pressed Omar to name him as his successor, Omar refused. Mansour then shot and killed Omar. Najibullah claimed Omar died at a southern Afghanistan hide-out in Zabul Province in the afternoon on 23 April 2013. Mullah Mohammad Yaqoob, Mullah Omar's elder son, denied that his father had been killed, insisting that he died of natural causes.  Omar's death brought about condolences from Ajnad al-Kavkaz, Ansar al Furqan, Islamic Front's Ahrar al-Sham, Jaish Muhammad, Jabhat Ansar al Din, Turkistan Islamic Party, Jamaat Ansar al Sunnah, Jaish al Ummah, Jamaat ul Ahrar, Caucasus Emirate, Jaish al-Islam, Nusra, AQAP, and AQIM, and Al-Shabaab.

Why wouldn't he name a successor?

OUT: