Ryan Won't Run for Senate

National Journal reports:

Rep. Paul Ryan is staying in the House, and won't run for the U.S. Senate, two well-placed GOP sources tell National Journal.

Ryan began informing close friends of his decision Tuesday and is expected to announce later in the day. Three GOP sources tell National Journal as soon as Ryan officially announces he won't run for the Senate, former Wisconsin GOP Gov. Tommy Thompson, is expected to announce his candidacy for the Senate seat being vacated by Democratic Sen. Herb Kohl, who recently announced he was retiring.