Republican presidential candidate Donald Trump responded on Thursday to attacks from Louisiana Gov. Bobby Jindal by suggesting he’d hardly even heard of his GOP rival.

Jindal has consistently ranked at the bottom of the polls, and the GOP frontrunner was happy to point out that out, according to a tweet by Bloomberg politics managing editor Mark Halperin.

Jindal called Trump a “narcissist” and “egomaniac” and released a video Wednesday suggesting actor Charlie Sheen as Trump’s running mate.

Jindal responded to Trump’s comments on social media.

.@realdonaldtrump is having a hard time lately & doesn’t remember we

met. He wrote a check. A fool & his money… https://t.co/OyUdFu37DS — Gov. Bobby Jindal (@BobbyJindal) September 10, 2015

Trump reiterated his thoughts on Twitter as well.

Bobby Jindal did not make the debate stage and therefore I have never met him…. — Donald J. Trump (@realDonaldTrump) September 10, 2015

This post has been updated.