Campaign spokesman Andy BarrGarland (Andy) Hale BarrElection Countdown: Family separation policy may haunt GOP in November | Why Republican candidates are bracing for surprises | House Dems rake in record May haul | 'Dumpster fire' ad goes viral Cook Political Report shifts two House race projections toward Dems GOP super PAC targets House districts with new M ad buys MORE said the campaign has raised more than it budgeted for the final week, and is using the funds to boost its presence in the Tucson and Yuma markets, both heavily Latino.

Carmona's campaign added 200 points to its television buy in Tucson and 500 points to its buy in Yuma. The campaign also increased its radio presence, adding 350 points in Tucson.

The Arizona Senate race is one of the closest in the nation, and a slight increase in on-air presence could make a difference on Election Day. Though Carmona has lagged Republican Rep. Jeff FlakeJeffrey (Jeff) Lane FlakeFlake threatens to limit Trump court nominees: report Poll: McSally holds 14-point lead in Arizona GOP Senate primary GOP senators introduce bill to prevent family separations at border MORE in most polls of the race, he's kept Flake's lead down to low single-digits and even slightly surpassed him in two polls, conducted in early October.

Flake has an advantage in the red lean of the state, but Carmona is outperforming President Obama. The race has remained close from the launch of the general election campaign, and The Hill rates it a toss-up.