Conversation so far:
When was Paul Ryan first elected to Congress?
Paul Ryan was first elected to the House of Representatives in 1998.
Which congressional district was Paul Ryan elected in?
Paul Ryan won the 1st District seat of Republican Mark Neumann, a two-term incumbent who had vacated his seat to make an unsuccessful bid for the U.S. Senate.
Was there any controversy in Paul Ryan's elections?
What has Paul Ryan done in Congress?
Paul Ryan's two proposals, The Path to Prosperity and A Better Way advocated for privatization of Medicare, conversion of Medicaid, repeal of the Affordable Care Act, and federal tax cuts.
Are there any other interesting aspects about this Paul Ryan's electoral history besides his campaigns for the House of Representatives?
In 2012, under Wisconsin election law, Paul Ryan was allowed to run concurrently for vice president and for Congress
Did Paul Ryan win the vice presidential election?
Mitt Romney and Paul Ryan lost the 2012 presidential election, but Ryan retained his seat in the House of Representatives.
Did Paul Ryan win his congressional election in 2012?
In 2012, Paul Ryan defeated Democrat Rob Zerban. This was the closest election of Ryan's congressional career.

Question: When did he serve on the ways and means committee?
Self-contained rewrite: When did Paul Ryan serve on the ways and means committee?