EXCLUSIVE — Former Vice President Mike Pence‘s policy group is ratcheting up its efforts to derail the nomination of Robert F. Kennedy Jr. with a wave of commercials aired ahead of a crucial Senate committee vote.

Advancing American Freedom is launching a six-figure ad buy on Fox News starting Tuesday morning attacking Kennedy, nominated for health and human services secretary, as a “Democrat plant” using President Donald Trump’s words from the campaign trail. The commercial will run through the week.