Flake has already won endorsements from the Club for Growth, the Tea Party group FreedomWorks and House Budget Chairman Paul Ryan (Wis.). Still, at least two Republicans are contemplating jumping in and setting up a primary battle. 

Rep. Trent Franks (R-Ariz.) and former Rep. J.D. Hayworth (R-Ariz.) are considering bids — if either one were to opt for a race, they would run to the right of Flake in a GOP primary. 

Hayworth was in Washington last week and told The Ballot Box he’s unimpressed with Flake’s fast start, saying the congressman only has the support of “the Washington crowd.”

“I don’t blame Jeff for trying to foster the delusions of inevitability and invincibility, but I think rather than the Washington crowd deciding things, I think people in Arizona will,” Hayworth said. 

The former congressman, who launched a failed primary challenge to Sen. John McCain (R-Ariz.) last cycle, said he’s in no rush to decide on a Senate bid.