Democrats are prepared to rally the party faithful and take action from the halls of Congress to across the nation should President Donald Trump fire special counsel Robert Mueller.

Lawmakers would move within minutes of such a move by the president, with their priority being saving the information Mueller and his team gathered in their investigation of Russia's role in the 2016 election and whether Trump obstructed the probe.

The series of contingency plans, as reported by NBC News, include nearly a thousand rallies being prepared from the Virgin Islands to Alaska.

And lawmakers would take to the floors of the House and the Senate to call for a Watergate-type of special congressional committee to pick up the investigation.

Democrats' priority would be saving the information special counsel Robert Mueller collected in his investigation with Senate Democratic Leader Chuck Schumer (above) working on legislation

Special counsel Robert Mueller may be called to testify before Congress if he is fired

Some lawmakers would immediately call for the president to be impeached and Mueller himself may be called upon to testify before congressional committees.

Lawmakers are also prepared in case Trump takes other actions to impede the investigation, such as firing Deputy Attorney General Rod Rosenstein or pardoning witnesses.

Democratic Senate Leader Chuck Schumer warned on Tuesday that Trump should not suggestion pardons for his former campaign manager Paul Manafort or his former personal attorney Michael Cohen.

'He had better not talk about pardons for Michael Cohen or Paul Manafort tonight or anytime in the future,' he said.

The first step of the plan would be for Schumer to consult with Senate Majority Leader Mitch McConnell as Democrat senators demand a floor vote on a bill retroactively protecting Mueller and the information his investigation collected, according to interviews NBC conducted with nearly a dozen lawmakers, congressional aides, Democratic operatives and attorneys involved in the planning.

Democratic lawmakers in both the House and Senate would reach out to Republicans they see as sympathetic to their plan and who have privately signaled to them they'd be willing to act if Trump tried to squash the Russia investigation.

'We've had a lot of conversations about how exactly and who and when and where,' Democratic Sen. Chris Coons told NBC News. 'There have been several moments when it seemed imminent.'

Additionally, across the country, rallies would be scheduled for 5 pm if Mueller is fired before 2 pm. If he's fired later in the day, protests would happen on noon the next day.

MoveOn.org, a Democratic group, has been organizing 933 protests, with locations selected and sponsors on hand to handle logistics.

More than 350,000 people have RSVP'd online to attend although there is no way to predict how many people would actually turn out.

Democratic lawmakers have long harbored considered Trump could fire Mueller, his bete noire that he frequently criticizes on Twitter as leading a political 'witch hunt' against him.

Other senior officials in the Russia investigation have been fired or forced out since Trump became president, including former Acting Attorney General Sally Yates, former FBI Director Jim Comey and former Deputy FBI Director Andrew McCabe.

On August 1, Trump took to twitter to push Attorney General Jeff Sessions to 'stop' the investigation 'right now' - a move the White House said was the president giving his opinion, not issuing an order.

'The president's stating his opinion. It's not an order,' said White House press secretary Sarah Sanders at the time.

Democratic Lawmaker Eric Swawell, who's said to be considering a 2020 White House bid, retweeted Trump's tweet with this message added: 'Fire Mueller and we fire you.'

Democratic Lawmakers are also prepared if President Trump fires Deputy Attorney General Rod Rosenstein or pardons any witnesses in the investigation

Given Republican control of both chambers of Congress, any success by the Democrats in protecting Mueller is contingent on GOP cooperation.

Democrats are also wary of and prepared for a 'Saturday Night Massacre' type scenario.

The Saturday Night Massacre was a series of events that took place during the Watergate scandal on the evening of Saturday, October 20, 1973. Then-President Richard Nixon ordered Attorney General Elliot Richardson to fire independent special prosecutor Archibald Cox but Richardson refused and resigned. Nixon then ordered Deputy Attorney General William Ruckelshaus to fire Cox but Ruckelshaus also refused and resigned.

It took the third-most-senior official at DOJ, Solicitor General Robert Bork, to fire Cox.