A short time later, the White House issued a short statement saying the president "has accepted the Speaker's invitation."
Pelosi notes in her letter that the invitation was made "in the spirit of respecting the Constitution" that calls for a president "to give from time to time give to the Congress Information on the State of Union." It's just one of several pointed references she makes highlighting the nation's founding principles.
She added that the address is meant to “ensure that balance of powers.” He would deliver the high-profile speech in the same House chamber where Democrats voted to impeach him on Wednesday and what kind of reception he would get is uncertain. President Bill Clinton gave his 1999 State of the Union address while his impeachment trial was underway in the Senate.
The tension between Pelosi and Trump has grown increasingly personal, with her referring to him as a "rogue president" and Trump calling her "Crazy Nancy" and earlier this week sending her an angry letter accusing her of orchestrating an "illegal, partisan, attempt coup."
The 2019 State of the Union address placed Pelosi and Trump at odds after she asked the president to postpone the State of the Union address or deliver it in writing citing security concerns during the government shutdown. The day after, Trump withdrew permission for her and other other lawmakers to use a government aircraft as they were about to leave for an official visit to Afghanistan.
Friday afternoon, as the stalemate over a Senate trial continued, White House counsel Pat Cipollone and Legislative Affairs Director Eric Ueland were being given a tour of the Senate chamber, where a trial would take place.
ABC News' Katherine Faulders contributed to this report.