Former Vice President Joe Biden said he “can hardly wait” to debate President Trump and jabbed the president’s previous comments calling himself a “very stable genius.”

“I can hardly wait. I can hardly wait to deal with what he refers to himself as – a stable genius. It can hardly wait to debate him,” Biden told NBC affiliate WBRE in Pennsylvania Thursday.

Biden, the presumptive Democratic presidential nominee, also lashed out at Trump after the president on Wednesday criticized the guidelines that the Centers for Disease Control and Prevention has released over several weeks and said that the agency was “asking schools to do very impractical things.”