United States presidential election

Sen. Kirsten Gillibrand, D-NY, smiles as she listens to a patron while visiting a coffee shop on Main Street in Concord, N.H., Friday, Feb. 15, 2019. Gillibrand visited New Hampshire as she explores a 2020 run for president. (AP Photo/Charles Krupa)

FILE - In this April 4, 2018, file photo, Paul Manafort, President Donald Trump's former campaign chairman, leaves the federal courthouse in Washington. (AP Photo/Andrew Harnik, File)

Sen. Kirsten Gillibrand, D-NY, shakes hands with a patron while visiting a coffee shop on Main Street in Concord, N.H., Friday, Feb. 15, 2019. Gillibrand visited New Hampshire as she explores a 2020 run for president. (AP Photo/Charles Krupa)

FILE - In this Jan. 19, 2019, file photo, U.S. Rep. Alexandria Ocasio-Cortez, D-New York, waves to the crowd after speaking at Women's Unity Rally organized by Women's March NYC at Foley Square in Lower Manhattan in New York. On Thursday, Feb. 14, newly-elected Rep. Alexandria Ocasio-Cortez led a chorus of cheers as Amazon announced it was abandoning plans to build a sought-after headquarters in New York City. Activists berated the online giant for a $3 billion package of tax breaks she said the city could better invest in hiring teachers or fixing the subway. (AP Photo/Kathy Willens, File)

Senate Majority Leader Mitch McConnell, R-Ky., walks to the chamber on the morning after House and Senate negotiators worked out a border security compromise hoping to avoid another government shutdown, at the Capitol in in Washington, Tuesday, Feb. 12, 2019. (AP Photo/J. Scott Applewhite)

FILE - In this Jan. 12, 2018 file photo, Virginia Gov.-elect, Lt. Gov Ralph Northam, center, walks down the reviewing stand with Lt. Gov-elect, Justin Fairfax, right, and Attorney General Mark Herring at the Capitol in Richmond, Va. The political crisis in Virginia exploded Wednesday, Feb. 6, 2019, when the state's attorney general confessed to putting on blackface in the 1980s and a woman went public with detailed allegations of sexual assault against the lieutenant governor. With Northam's career already hanging by a thread over a racist photo, the day's developments threatened to take down all three of Virginia's top elected officials. (AP Photo/Steve Helber, File)

Sen. Elizabeth Warren, D-Mass., acknowledges cheers as she takes the stage during an event to formally launch her presidential campaign, Saturday, Feb. 9, 2019, in Lawrence, Mass. (AP Photo/Elise Amendola)

Chairman of House Ways & Means Committee Oversight Subcommittee Rep. John Lewis, D-Ga., speaks with Ranking Member Mike Kelly, R-Pa., during a hearing on proposals to compel presidents and presidential candidates to make public years of their tax returns on Capitol Hill, Thursday, Feb. 7, 2019, in Washington. But the burning question is what Democrats might do more immediately to get such files from President Donald Trump. (AP Photo/Jose Luis Magana)

In this May 25, 2003, photo, Paul Erickson, a Vermillion native, poses for a photo. The American political operative, Erickson, linked to admitted Russian covert agent Maria Butina was accused this week of fraud. Erickson pleaded not guilty Wednesday, Feb. 6, 2019, to 11 counts of wire fraud and money laundering in business schemes that stretched from 1996 through August 2018, according to federal prosecutors in South Dakota. (Lloyd B. Cunningham/The Argus Leader via AP)

FILE- In this Sept. 25, 2018, file photo, Virginia Lt. Gov. Justin Fairfax gestures during remarks before a meeting of the Campaign to reduce evictions at a church meeting room in Richmond, Va. A California woman has accused Fairfax of sexually assaulting her 15 years ago, saying in a statement Wednesday, Feb. 6, 2019, that she repressed the memory for years but came forward in part because of the possibility that Fairfax could succeed a scandal-mired governor. (AP Photo/Steve Helber)