Act of Treason (Mitch Rapp #9) by Vince Flynn

He's got a plan.   He's got an enemy.
Time to execute them both.

There are two weeks to go to the US presidential election when the hot favourite, Josh Alexander, is ambushed by a terrorist bomb. He narrowly escapes, but members of his entourage are not so lucky. Alexander is carried to victory by a symptahy vote.

On the surface, it appears to be the work of al-Qaeda. But then CIA director Irene Kennedy is presented with classified information so toxic that she has no option but to call on Mitch Rapp, America's top counterterrorism operative: the one man reckless enough to follow the evidence to its explosive conclusion . . .