Vulnerable Sen. Mark PryorMark Lunsford PryorCoronavirus poses risks for Trump in 2020 Tom Cotton's only Democratic rival quits race in Arkansas Medicaid rollback looms for GOP senators in 2020 MORE (D-Ark.) is running to the right in his new ad, claiming he's pushed to shrink government and touting his opposition to Environmental Protection Agency regulations, while voters tout his fiscal conservatism.

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"The EPA wanted to write a federal regulation regulating agriculture dust. Obviously, Washington knows nothing about farming. Working with Republicans and Democrats, we stopped them. But there's more work to be done," Pryor said in the ad, first shared with The Hill.

Voters then say Pryor "led a bipartisan effort to cut regulations" and "supported tax cuts for small business," before Pryor says he's "working to help make Washington smarter — and smaller."

The ad is running in tandem with another new attack ad ripping his opponent, Rep. Tom CottonTom Bryant CottonKoch-backed group urges Senate to oppose 'bailouts' of states in new ads Lincoln Project offers list of GOP senators who 'protect' Trump in new ad Mellman: Roberts rescues the right? MORE (R-Ark.), for voting against "equal pay for women" and against "helping women who are victims of domestic violence."

Pryor has worked hard to appeal to conservative-leaning voters in Arkansas, which has trended away from Democrats in recent years.

Most recent polling shows Cotton with a narrow lead in the race, one of a handful that will decide Senate control after next month's election.