WASHINGTON — Reps. Roy Blunt and John Boehner, rivals in the race to succeed Majority Leader Tom DeLay, both claimed progress Monday and released the names of supporters to prove it. The two men maneuvered for support as Rep. Eric Cantor of Virginia claimed the votes needed to move up the leadership ladder when elections are held early next month. "He has 140 firm commitments for majority whip," said Cantor's spokesman, Rob Collins. He declined to provide a list. Cantor has been serving as deputy whip under Blunt. Not to be deterred, Rep. Todd Tiahrt, R-Kan., announced he would run...