His campaign is releasing a new ad touting his work on this issue.
Republican David Jolly will face Democrat Alan Grayson in Monday's debate.
All but one of the buys are aimed at protecting vulnerable incumbents.
Sarah Ferris 04/19/16 08:31 AM EDT
Ayotte holds one of the Senate’s most at-risk seats in 2016
Chris Van Hollen faces off against fellow Rep. Donna Edwards in the Democratic primary.
She said Trump "could be a detriment" to vulnerable Senate incumbents.
Rep. Joe Heck is well ahead of Sharron Angle, according to a new poll.
"If Republicans stick with their position, we're going to win back the majority," he said.
“We’re still in the evaluation process,” Rep. Mike Pompeo told The Hill.
Deborah Ross raised $1.3 million in the quarter, compared to Burr's $1.1 million.