Only in the borderbots fevered brains.
Jacob's unfit for office, I grant you, but so what? If he's elected, he's going to be a freshman congressman from a backwater district with virtually no influence. He won't be in a position in which to harm the country with his nuttiness. Most likely, he'll just vote the House party line. I don't see why that's such a problem.
Cannon, on the other hand, is highly influential and a major player for the open-borders lobby in the house. He already has done tremendous harm to the nation, and is poised to do much more.
It's not a hard choice.
Perhaps the cynical nature of the above analysis offends your idealistic sensibilities. Too bad. Patriotic conservatives need to learn realpolitik or else we're doomed to lose.