Kentucky Sen. Rand Paul said Monday he is ready to refocus his presidential campaign on attempting to take down Republican front-runner Donald Trump.

On a conference call with reporters, Paul, whose campaign has languished in the polls amid tepid fundraising and a shifting politics on national security issues, said he is planning to expose Trump as “an empty suit full of bravado but not anything meaningful for the country.”

“The truth-telling is bluster, the truth-telling is non-sequitur, it’s self-aggrandizement,” Paul said. “Is there really anything substantive coming out of saying people are fat, people are stupid?”

“Are we going to fix the country simply through bombast and empty blather,” he asked.