Edward Snowden tweeted Tuesday that "every American should condemn" President Trump's firing of FBI Director James Comey.

"Set aside politics: every American should condemn such political interference in the Bureau's work," Snowden tweeted.

Comey confirmed in March that the FBI is investigating whether members of the Trump campaign coordinated with Russia against the Democratic Party during the 2016 election.

After the White House's announcement about Comey, congressional Democrats immediately drew parallels to the "Saturday Night Massacre" and Richard Nixon's dismissal of independent special prosecutor Archibald Cox during the Watergate scandal.

"This FBI Director has sought for years to jail me on account of my political activities. If I can oppose his firing, so can you."