Responding to Joe Biden’s stinging presidential announcement, Donald Trump returned fire by questioning the intelligence of the former VP.

“Welcome to the race Sleepy Joe,” the president wrote on Twitter.

“I only hope you have the intelligence, long in doubt, to wage a successful primary campaign.”

Trump also predicted (probably accurately) that the race will become vitriolic.

“It will be nasty – you will be dealing with people who truly have some very sick & demented ideas,” he wrote. “But if you make it, I will see you at the Starting Gate!”

Welcome to the race Sleepy Joe. I only hope you have the intelligence, long in doubt, to wage a successful primary campaign. It will be nasty – you will be dealing with people who truly have some very sick & demented ideas. But if you make it, I will see you at the Starting Gate!

— Donald J. Trump (@realDonaldTrump) April 25, 2019

Biden’s video announcement was highly critical of Trump’s handling of the neo-Nazi protests in Charlottesville, with a somber warning: “If we give Donald Trump eight years in the White House, he will forever and fundamentally alter the character of this nation. And I cannot stand by and watch that happen.”

Twitter was quick to call Trump out:

‘Sleepy Joe’ is one of the odd nickname coming from a man who does nothing but sit in front of his TV all day and not work

— Roland Scahill (@rolandscahill) April 25, 2019

the laziest man in American government (see attached for today's grueling schedule) is spending one more day watching himself on TV, playing with his phone and I'm sorry, remind me which one is the 'sleepy' one again pic.twitter.com/2iFkZ0udUH

— Jeff Tiedrich (@itsJeffTiedrich) April 25, 2019

Prisons don’t have starting gates.

— Devin Nunes’ cow (@DevinCow) April 25, 2019

I'll never get used to a US president whose first reaction to every normal challenge is to insult and denigrate https://t.co/Ad9fUfdVbV

— Frida Ghitis (@FridaGhitis) April 25, 2019

Nasty, unintelligent, very sick & demented — projection is thy name, #DerangedDonald. https://t.co/TUGuGoEb3b

— Aunt Emma (@yourauntemma) April 25, 2019