On its current path, the impeachment case against President Trump is on a collision course with perhaps the most pivotal period in the Democratic primary, threatening to unravel the campaign plans of some of the top 2020 contenders.

A bitterly divided House of Representatives voted on Thursday to endorse the Democratic-led impeachment inquiry into President Trump, in a historic action that set up a critical new public phase of the process and underscored the toxic political polarization that serves as its backdrop.

The House is set to vote Thursday morning on how to proceed with its impeachment inquiry into President Donald Trump — a move that will put lawmakers on record about where they stand and that Republicans are decrying as a sham.

Testimony of a White House national security official turned combative Tuesday as Democrats accused Republicans of trying to unmask the whistleblower who sparked the impeachment inquiry of President Trump, while the GOP lawmakers argued theirs was a legitimate line of questioning.

House Democrats unveiled new procedures for the impeachment inquiry of President Trump on Tuesday, responding to Republican demands for due process by setting out rules for future public hearings delving into whether Trump should be removed from office.