IT BEGINS: Tom Cotton targets Mark Pryor’s vote on government funding in his first ad of Arkansas Senate race.

Sen. Mark Pryor’s vote for a government funding bill the included health care subsidies for members of Congress and their staff is now being used as an attack line by his re-election challenger.

In Rep. Tom Cotton’s first television ad of his Arkansas Senate campaign, unveiled Monday, a narrator hits Pryor, D-Ark., for supporting a government funding measure without other provisions, including the health care subsidies, attached.

“Mark Pryor cast the deciding vote to make you live under Obamacare,” a narrator says. “But Pryor votes himself, and everyone in Congress, special subsidies so they’re protected from Obamacare.”

There will be a lot more of this.