Jeb Bush is finally endorsing in the big GOP primary, but it's not the primary we've been waiting for.

Sen. John McCain's (R-Ariz.) reelection campaign announced Wednesday that Bush will back him over former Rep. J.D. Hayworth (R-Ariz.).

We'll continue to wait and see whether Bush feels the need to weigh into the GOP primary in his home state. At this point, though, he'd really just be piling on by endorsing Marco Rubio over Charlie Crist.

Here's Bush's statement: "As we continue to face tough challenges both at home and abroad, America needs leaders like Senator John McCain in the United States Senate. John has devoted his life to service and sacrifice for our nation, and demonstrated time and again that he is beholden to no interest other than what is best for America. John is a proven conservative leader committed to reducing taxes, fighting wasteful spending and keeping America safe. We need John’s continued leadership in the United States Senate, and I am proud to support him.”