You may have thought talk of impeachment was over after the failure of Mueller probe into allegations of Russian collusion with the Trump campaign in 2016, but Nancy Pelosi’s Democrats have opened a fresh can of worms for all concerned with her decision to launch a formal impeachment inquiry.

Why?

Pelosi contends that Donald Trump postponed $400 million in military aid to Ukraine in order to coax their president into investigating alleged financial impropriety by Joe Biden and his son, Hunter, a move that would have benefited Trump electorally and damaged a rival candidate.

House Speaker Pelosi said such actions would be a “betrayal of his (Trump’s) oath of office”, declaring that “no one is above the law”.

President Trump has said he will release transcripts this week of the phone call between himself and the new Ukranian President Volodymyr Zelenskiy, accusing Democrats of “Presidential Harrasment”. The controversy erupted after a whistle-blower told Democrats the US president had abused his presidential powers during the call.

The announcement of a new impeachment attempt by Democrats is a high risk strategy according to analysts, with only a slight chance of success due to the Republican controlled Senate. Failure to impeach would only benefit the incumbent president in the 2020 elections as the public increasingly appears to tire of opponents’ attempts to eject him prematurely from office.