White House Press Secretary Sean Spicer may have felt like he was backed into a corner when MSNBC White House correspondent Hallie Jackson pressed him about why President Donald Trump would need Congress to investigate wiretapping if he already has the evidence that it happened.

During the White House briefing on Tuesday, Spicer was asked if the president already had proof that former President Barack Obama ordered illegal wiretaps on him and if so, why is he asking Congress to investigate instead of just presenting the facts.

“You said the president stands by his tweets Saturday morning that President Obama ordered this wiretap,” Jackson noted. “You’ve also said that the president wants Congress to investigate. Some members of Congress, by the way, have asked the White House and asked the president to come forward with the information.”

“So bottom line, why would the president want Congress to investigate for information he already has?” she asked.

Spicer claims that Trump was worried about the “separation of power aspect.”

“It’s a question of appropriateness,” Spicer said.

Jackson continued on: “But if the president has the info… if he’s sitting on this information, if he’s found out — he’s now directing or asking or recommending that the intelligence committees look into this. And you talked about they have resources and staff, which they do. But why expend those resources and staff if the president found out this information and has it?”

Trump wants Congress to “add credibility” to his statements, Spicer said.

“I think we’ve made it very clear how he wants this done,” the press secretary concluded.