Nancy Pelosi has put the Trump impeachment inquiry on a fast track. Here's the plan, timeline and key players

WASHINGTON – House Speaker Nancy Pelosi says she wants to move "expeditiously" on the impeachment inquiry into whether President Donald Trump abused his power by pushing Ukraine to investigate his political rival, Joe Biden.

At the center of the inquiry, which was launched last week, is a complaint from an unidentified intelligence agency official. The complaint accuses Trump of having "used the power of his office" to solicit foreign interference to discredit Biden, the 2020 Democratic frontrunner. It also alleges that White House officials sought to "lock down" records of a July 25 phone call between Trump and Ukraine President Volodymyr Zelensky in which the president urged Zelensky to investigate Biden and his son, Hunter, who once had business interests in Ukraine.

Trump contends he did nothing improper and accuses Democrats of wanting to overturn the results of the 2016 election.

Some lawmakers want the House to decide whether to file articles of impeachment by Thanksgiving, a timeline that could avoid having the issue spill over into the 2020 election year.