Waxman also led a high-profile campaign to expose tobacco industry marketing practices; has long fought for expanding public health coverage and was a major supporter of President Obama's Affordable Care Act; was an author of the federal Clean Air Act and a leading voice for the government to take action on climate change; and even led hearings into the use of performance-enhancing drugs in baseball.

His statement indicated he's not pleased with the ideological polarization in the House today — a state of affairs perhaps best illustrated by House Republicans' attempt to curb the new health care law last fall, a moved that led to a 16-day shutdown of the federal government. But Waxman said that's not why he's leaving Congress:

“There are elements of Congress today that I do not like. I abhor the extremism of the Tea Party Republicans. I am embarrassed that the greatest legislative body in the world too often operates in a partisan intellectual vacuum, denying science, refusing to listen to experts, and ignoring facts.

“But I am not leaving out of frustration with Congress. Even in today’s environment, there are opportunities to make real progress. Last Congress, I worked with Democrats and Republicans in the House and Senate to pass legislation that will ease the nation’s growing spectrum shortage, spur innovation in new ‘Super WiFi’ technologies, and create a national broadband network for first responders. Just last year, I worked on a bipartisan basis to enact legislation strengthening FDA’s authority to stop dangerous drug compounding and to track pharmaceuticals through the supply chain.

“And I am not leaving because I think House Democrats have no chance to retake the House. House Republicans have no compelling vision for the future. The public understands this, and I am confident that the Democrats can regain control of the House.

“The reason for my decision is simple. After 40 years in Congress, it’s time for someone else to have the chance to make his or her mark, ideally someone who is young enough to make the long-term commitment that’s required for real legislative success. I still feel youthful and energetic, but I recognize if I want to experience a life outside of Congress, I need to start soon. Public office is not the only way to serve, and I want to explore other avenues while I still can."

Henry WaxmanHenry Waxman

Rep. Henry Waxman, Liberal Democrat from Los Angeles, to Retire from Congress