PHOENIX (AP) — Little in Arizona cools off in the middle of August. One exception is the GOP’s Senate primary election, where the wealthy businessman who spent $6 million of his own money on the race has scaled back his TV ad presence in what many see as tacit acknowledgment that he’s failed to catch up to Rep. Jeff Flake.

With voting set for Tuesday, Wil Cardon has now taken a positive tone. He had pummeled Flake for four months on the state’s airwaves, framing Flake as a Washington insider who is soft on illegal immigration and reneged on a pledge to serve three terms in Congress.