It was just last weekend when Donald Trump took to his Twitter account and accused former President Barack Obama of Wiretapping his offices in Trump Tower. After a week of failing to present proof, Congress is now calling on the president to back up his claims.

Trump wiretapped?

After the Washington Post broke a bombshell story earlier this month revealing that Attorney General Jeff Sessions met with Russian officials during the presidential election, the White House scrambled to correct the narrative. As part of their defense, Donald Trump used Twitter last week to change the direction of the allegations.

The former host of "The Apprentice" called for an investigation into Democratic leaders, targeting Sen. Chuck Schumer and Rep. Nancy Pelosi, while posting pictures of the two meeting with officials from Russia. Hours later, Trump then accused Obama of the aforementioned wiretapping conspiracy, though he never presented evidence. As reported by the Associated Press, and the Washington Examiner, on March 11, Congress is now demanding answers.

According to the report in the AP, the House Intelligence Committee in Congress sent a letter of request to the White House and is asking "the executive branch to provide by Monday" any credible evidence to back up Donald Trump's claim of wiretapping at Trump Tower.

Two Democratic leaders on the committee, chairman Rep. Devin Nunes, and Rep. Adam Schiff, were the ones to pen the letter in question.

"I haven't seen any evidence whatsoever to substantiate that," Adam Schiff said over the weekend, echoing the sediments of many of those in Congress.

Schiff took part in a classified meeting on Friday with James Comey, the director of the FBI, but no information on the wiretapping allegations were given.

GOP questions claims

Democrats aren't the only ones who are doubting Donald Trump's claim, as Senate Majority Leader Sen.

Mitch McConnell told reporters last week that he has "no evidence" in regards to the allegations made against Obama. In addition to McConnell, Sen. Lindsey Graham went as far as saying that Congress "must get to the bottom" of the allegations, while asking the FBI to produce a "paper trail."