Houston ? John McCain picked up former President George H.W. Bush’s support on Monday, a critical blessing by a pillar of the Republican establishment whose members aren’t completely sold on the party’s next standard-bearer.

“Few men walking among us have sacrificed so much in the cause of human freedom. And I’m happy to help this remarkable patriot carry our party banner forward,” Bush said, standing alongside the GOP’s nominee-in-waiting in an airport hanger.

In endorsing McCain, the patriarch of the Republican political dynasty sent a strong message to a party base wary of the Arizona senator because of his reputation for bucking the GOP on several high-profile issues.