Flake has already won endorsements from the Club for Growth, the Tea Party group FreedomWorks and House Budget Chairman Paul RyanPaul Davis RyanMcCarthy faces pushback from anxious Republicans over interview comments Pelosi and Trump go a full year without speaking Jordan vows to back McCarthy as leader even if House loses more GOP seats MORE (Wis.). Still, at least two Republicans are contemplating jumping in and setting up a primary battle. 

Rep. Trent FranksHarold (Trent) Trent FranksArizona New Members 2019 Cook shifts 8 House races toward Dems Freedom Caucus members see openings in leadership MORE (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 McCainJohn Sidney McCainSenate is leaning to the Democrats, big time, with a wave Budowsky: Trump's COVID-19 death toll dominates election Democrats seem unlikely to move against Feinstein MORE (R-Ariz.) last cycle, said he's in no rush to decide on a Senate bid.