Donald Trump is calling Joe Biden a ‘crackhead.’ Republicans are just sighing.

Former President Donald Trump says a lot of things on his social media site, many of them recycled bits from past speeches or interviews.

But since cocaine was found in an area of the White House trafficked by visitors, Trump has oddly and repeatedly made a new claim — that President Joe Biden has used or currently uses cocaine, even though there’s no evidence Biden, who’s held federal office almost continuously since 1973, has ever touched the stuff.

And Trump didn’t just make the claim once — he’s made it at least four times on his social media site, Truth Social, and at least once in an interview.

“We can’t have a president who’s on cocaine when you’re dealing with nuclear weapons and everything else,” Trump told right-wing commentator Wayne Allen Root in a telephone interview Wednesday.

Asked last week about Trump’s wild claim that Biden has used or is using cocaine, Republicans on Capitol Hill responded with a mixture of surprise and resignation,…