As he prepares to take the stage Wednesday for the second televised Republican presidential debate, Kentucky Sen. Rand Paul is making it clear he wants to use the airtime to go after Donald Trump again.

“I think he deserves both barrels,” Paul said in a Tuesday afternoon interview with The Daily Caller. “I want to make sure everyone in the whole country knows he’s a fake conservative.”

Paul went on offense against Trump harder than any other Republican in last month’s Fox News debate. But despite the attacks, Trump’s numbers have only gotten stronger while Paul’s have faded.

Previewing his argument against the New York businessman at Wednesday’s Reagan Library debate in California, Paul said voters just need more time to learn about Trump’s past positions: “I think ultimately when voters fully grasp who he is and what he supports, I think they’ll run away with their hair on fire.”