Hours before he was due back in a Manhattan court for his hush-money case and the Supreme Court was to take up his presidential immunity case, Donald Trump made a surprise campaign stop at a Midtown Manhattan construction site.

Trump fist pumped at cheering union workers at the construction site of the new J.P. Morgan Chase building. 

He also met and talked with supporters and shook hands.

"I did nothing wrong," Trump said. "It's a political witchhunt. It's election interference, that's all it is."

When asked about the Supreme Court case, Trump said, "A president has to have immunity. If you don't have immunity, you'll just have a ceremonial president."

After a day off, the jury will hear more testimony onThursday in the former president's New York hush-money case.

Veteran tabloid publisher David Pecker will be back on the stand.

Prosecutors say Pecker, a longtime Trump friend,  worked with former Trump lawyer Michael Cohen to buy up and then kill negative stories about the businessman.

They allege that Trump sought to illegally influence the 2016 race by preventing damaging stories about him from becoming public.

Trump made payments to kill any coverage of an alleged affair Trump had with adult film star Stormy Daniels.

The accounting of those payments is the basis for the prosecution's case against Trump. He faces 34 felony charges in the case.