If you follow the money, it seems that Donald Trump's days in office may not last until 2021.

Bets have flooded into Trump impeachment markets since he fired FBI director James Comey last week.

"Right now he’s 2/1 but that may not last for long given the flow of money that we’re seeing," a Paddy Power spokesperson told Newstalk.

The company added that at the height of the 'Lewinsky scandal', Bill Clinton was only ever 6/1 to be impeached - he was ultimately impeached in 1998.

Donald Trump was 16/1 to be impeached during his first term when he was elected - this dropped to 10/1 by the time he took office in January.

The firm describes the movements on this market as "staggering, given how rare and complex a process it (impeachment) is."

Fallout

Paddy Power Betfair included a special note on the US election in a recent trading statement - it faced a €4.1m payout on winning Trump bets after it already paid some €880,000 to Clinton backers. At the time the company called him, "the biggest political liability" in the history of gambling.

In the latest chapter in the controversy concerning connections between Trump's campaign and Russia, it was reported overnight that Mr Trump had urged the then-FBI director James Comey to end an investigation into former national security adviser Michael Flynn.

Michael Flynn resigned from his position in February, amid claims he misled the administration about his contacts with Russia. 

The FBI, meanwhile, has been carrying out an investigation into alleged links between the Trump campaign and Russia.