Wow, so Tancredo said it was time for Delay to step down. BFD. Fact, Delay's time was up. He became a liability to the House GOP and the President. Opposition to the Pence proposal is consistent with Tancredo's (and Sensnebrenner's) opposition to amnesty. Jacobs was a nobody! The idea behind challenging Chris Cannon, was to expose Cannon for being a double-talker on immigration reform. And it worked. While Cannon supports HR4437, he's voted against some specific amendments in past immigration reform proposals.
Reagan challenged a sitting POTUS in 1976. Reagan criticized Ford from the get-go, through the primaries and into the GOP Convention. Reagan wasn't afraid to speak out. Tancredo isn't afraid to speak out either.
Tancredo is a Reagan conservative, to the core.