Harry Reid, the Nevada Democrat who served as Senate majority leader during the George W. Bush and Obama administrations, has died at the age of 82. During Obama’s presidency, Reid shepherded through several major bills including the Affordable Care Act in 2010 and a $787 billion stimulus package that followed the financial crisis of 2009. Obama paid tribute to Reid Tuesday, writing that he would not have become president had it not been for Reid’s encouragement and support.

Harry Reid was one of the 77 senators who voted to authorize the U.S.-led invasion of Iraq in 2002. Reid would later call his vote a “horrible mistake,” telling The Nevada Independent, “It tainted my heart. It was the wrong thing to do. But I was sucked in by General [Colin] Powell and others and I believed them. So I regret that, yes, I do.”