Speaking in his hometown of Newton, Mass., Monday, Rep. Barney Frank announced his retirement after more than three decades in Congress.
Frank, 71, is the senior Democrat on the House Financial Services Committee.
He helped push through legislation that provided the most extensive overhaul of Wall Street in decades.
Frank said he had a "busy and stressful" four years dealing with financial reform after the recession.
Frank was one of the first lawmakers to announce that he is a homosexual.
He consistently voted on the liberal side of public issues, opposing the war in Iraq and its costs.
Frank said he plans to write and act as a public policy adviser.