Former FBI Director James Comey is sworn-in before testifing before the Senate Intelligence Committee in the Hart Senate Office Building on Capitol Hill June 8, 2017 in Washington, DC. Comey said that President Donald Trump pressured him to drop the FBI's investigation into former National Security Advisor Michael Flynn and demanded Comey's loyalty during the one-on-one meetings he had with president. (Photo by Mark Wilson/Getty Images)

Victoria Bassetti of the Brennan Center guides us through the tangled web of investigations into Russian meddling into the 2016 election and its aftermath.

Trump Twitter Account

Why are investigators pouring over the President’s tweets?

U.S. Sen. Charles Schumer (D-NY) (L) talks with one of his staff members during a markup session for the immigration reform legislation now before the Senate Judiciary Committee in the Hart Senate Office Building on Capitol Hill May 20, 2013 in Washington, DC. (Photo by Chip Somodevilla/Getty Images)

How Republicans aim to change the courts under President Trump

A supporter holds a copy of the U.S. Constitution during a campaign rally with Democratic presidential nominee former Secretary of State Hillary Clinton at The Armory on November 6, 2016 in Manchester, New Hampshire. With two days to go until election day, Hillary Clinton is campaigning in Florida and Pennsylvania. (Photo by Justin Sullivan/Getty Images)
David Barron

Before David Barron was a federal judge, he was a lawyer advising President Obama on the use of military might.