( CNN) President Donald Trump is wasting no time in attempting to torch House Speaker Nancy Pelosi's impeachment gamble in a battle that will define his presidency and the 2020 election.

Trump's decision marks a deviation for a White House that has a record of stymie oversight and bending fact. So his critics will await events on Wednesday with particular interest.

The transcript and the congressional reaction to the whistleblower's report could be critical in establishing the early terrain of the impeachment fighting and to influence public opinion that will ultimately dictate how it turns out.