The Arizona Daily Star:

Former Arizona Congressman J.D. Hayworth says he is planning to run against John McCain for his U.S. Senate seat.
Hayworth, a Republican, told The Associated Press late Friday he stepped down as host of his radio program on KFYI-AM, a conservative radio talk show in Phoenix. Legally, he would not have been able to remain host of the program and be an active candidate.

Permit me a grim, but realistic thought. John McCain seems like a very healthy man for a 73-year-old, but he’s still 73. In August he turns 74. He wants to run for another six-year term.

Hayworth has an uphill climb, and Sarah Palin’s backing will probably help McCain with Arizona conservatives who might be tempted to look at other options. But at some point, John McCain’s seat is going to open up, and a strong showing this year would probably make Hayworth the odds-on favorite GOP candidate in some future run.