Turnabout is fair play — and now it’s President Trump’s turn.

Trump’s impeachment defense came out with rhetorical guns blazing Saturday – accusing the House Democrats’ impeachment managers of hiding evidence from the senators who must decide whether to kick the president out of office.

“Today we are going to confront them on the merits of their argument,” Pat Cipollone, President Trump’s White House counsel, said in the opening minutes of Trump’s defense. “They have the burden of proof and they have not come close to meeting it.”

“We intend to show you some of the evidence that they decided not to show you,” Cipollone said. “And every time you see one of these pieces of evidence, ask yourself: why didn’t I see that in the last three days? …Why didn’t they show that to the Senate?”

Ever the promoter, Trump – who has bemoaned the Saturday schedule for his opening argument, calling it “Death Valley for TV” – tweeted an early alert for his followers.

“Our case against lyin’, cheatin’, liddle’ Adam “Shifty” Schiff, Cryin’ Chuck Schumer, Nervous Nancy Pelosi, their leader, dumb as a rock AOC, & the entire Radical Left, Do Nothing Democrat Party, starts today at 10:00 A.M.!” he posted Saturday.

On Friday, Trump made it clear he was confident he will be cleared.

“What my people have to do is just be honest, just tell the truth,” Trump told Fox News. “The Democrats, they’ve been telling so many lies, so many fabrications, so much exaggeration. And this is not impeachable.”

Trump’s lawyers, led by White House counsel Pat Cipollone, are scheduled to give a relatively brief three-hour introduction to their case Saturday, starting at 10 a.m.

“I guess I would call it a trailer. Coming attractions. That’d be the best way to say it,” Trump attorney Jay Sekulow said Friday. “Next week is when you’ll see the full presentation, but there’ll be plenty to see.”

But, he hinted, it may feature fresh broadsides against former Vice President Joe Biden, his son Hunter, and Hunter’s onetime employer, the Ukrainian energy company Burisma.

The defense team’s initial plan appeared to rely heavily on constitutional law and historical analysis — as their 110-page brief, and the recruitment of legal heavy hitters Alan Dershowitz and Ken Starr, indicated.

But the House impeachment managers’ blistering attacks on Trump’s character in their 24-hour, three-day opening statement — and their repeated mentions of the Bidens’ dealings in Ukraine — forced a change in tactics, the president’s lawyers said.

“The House managers … made it very relevant to the case, that they spent a lot of time bringing the Bidens into this case and have established that there is something relevant that’s there,” a source on the legal team told reporters.

“We’ll have to be addressing that since they opened that up.”