US Sen. Richard Burr, chairman of the Senate Intelligence Committee, points to a reporter during a news conference in Washington on Wednesday, March 29. The Senate is also conducting a Russia investigation, but unlike the House it has not stalled along partisan lines. Burr and Sen. Mark Warner, the top Democrat on the committee, were laughing, smiling and generally collegial during Wednesday's news conference when they announced they have 20 witnesses they plan to interview. Susan Walsh/AP

US President Donald Trump participates in a White House roundtable with women who are small business owners on Monday, March 27. JIM WATSON/AFP/Getty Images

White House press secretary Sean Spicer holds up a document during his daily news briefing in Washington on Tuesday, March 28. Spicer said the White House does not seek to prevent Sally Yates, the former acting attorney general, from testifying in the House Intelligence Committee's investigation of Russian meddling. The statement came after a Washington Post report, which cited a Justice Department letter to Yates' attorney that said Yates' communications with the White House counsel "are likely covered by the presidential communications privilege." Spicer said the White House does not believe executive privilege should be an issue in Yates testifying. Andrew Harnik/AP

Georgia lawmakers throw paper into the air at the conclusion of the legislative session in Atlanta on Friday, March 31. David Goldman/AP

Interior Secretary Ryan Zinke, accompanied by Republican members of Congress, signs an order Wednesday, March 29, that lifts a moratorium on new coal leases on federal lands. Molly Riley/AP

A Trump supporter is punched in the face at a pro-Trump rally in Huntington Beach, California, on Saturday, March 25. Fights broke out after an anti-Trump protester allegedly doused an event organizer with pepper spray, according to the Los Angeles Times. Irfan Khan/Los Angeles Times/Getty Images

Ivanka Trump, the President's daughter, greets female students in Washington while touring the National Air and Space Museum on Tuesday, March 28. Education Secretary Betsy DeVos was also touring the museum to celebrate Women's History Month and encourage girls to study science, technology, engineering and mathematics. Win McNamee/Getty Images

Vice President Mike Pence, third from left, tries to stop President Donald Trump as Trump walks out of an executive order signing ceremony on Friday, March 31. During the signing ceremony, White House pool reporters asked Trump questions about former national security adviser Michael Flynn, who has offered to testify on Russian involvement in the US election. The President ignored the questions and moved to another room to sign the two executive orders, which regarded trade policy. Andrew Harnik/AP

North Carolina House Minority Leader Darren Jackson holds a copy of House Bill 2, the state's controversial bathroom law, during a House floor debate on Thursday, March 30. Lawmakers later passed a bill to repea l HB2, which required people at a government-run facility to use bathrooms and locker rooms that correspond to the gender on their birth certificate. Brian Blanco/AP

First lady Melania Trump poses with Sandya Eknelygoda on Wednesday, March 29, after Eknelygoda received an award at the Secretary of State's International Women of Courage Awards. The awards honor women across the globe who have overcome injustice and gone on to transform their societies, often in the face of personal danger. Eknelygoda is a human rights activist in Sri Lanka. Glen Johnson/Planet Pix/ZUMA Wire

People carry inflatable rafts in front of New York's Trump Tower as they protest the President's refugee policies on Tuesday, March 28. JUSTIN LANE/EPA

House Speaker Paul Ryan attends the annual policy conference of the American Israel Public Affairs Committee on Monday, March 27. During his speech, Ryan said President Trump and the United States stand firmly behind Israel. Noam Galai/Getty Images

US Defense Secretary James Mattis, left, attends a news conference in London with his British counterpart, Michael Fallon, on Friday, March 31. JUSTIN TALLIS/AFP/Getty Images

President Trump gives away a pen after signing a bill Monday, March 27, that overturned a rule on school accountability standards. Trump signed four bills Monday to nullify measures that were put in place during the previous administration. Andrew Harrer/Pool/Getty Images

US Secretary of State Rex Tillerson, center, leaves a wreath-laying ceremony at Anitkabir, the mausoleum of Turkey's modern founder in Ankara, Turkey, on Thursday, March 30. Tillerson met Turkish leaders a day after Ankara announced the end of its military offensive in Syria. Adem Altan/AFP/Getty Images

Hillary Clinton speaks at Georgetown University in Washington on Friday, March 31. The former secretary of state was speaking at an event honoring women who contributed to the recent peace process between the Colombian government and FARC rebels. She talked about the important role that women can play in international politics and peace-building efforts. Susan Walsh/AP

US Vice President Mike Pence, left, swears in David Friedman as the US ambassador to Israel on Wednesday, March 29. Friedman's wife, Tammy Sand, looks on. MANDEL NGAN/AFP/Getty Images

People gather in front of the US Supreme Court to protest and support the nomination of Neil Gorsuch on Wednesday, March 29. The Senate plans to vote on Gorsuch on April 7, according to Majority Leader Mitch McConnell. BRENDAN SMIALOWSKI/AFP/Getty Images

FBI Director James Comey speaks at the Intelligence and National Security Alliance Leadership Dinner, which was held in Alexandria, Virginia, on Wednesday, March 29. During a question-and-answer session, Comey said his agency makes its decisions on a nonpartisan basis, and he said he doesn't care about the political backlash of the choices he makes. Chip Somodevilla/Getty Images