President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE on Saturday morning encouraged his followers on Twitter to watch his lawyers present his defense in the impeachment trial beginning at 10 a.m.

Trump encouraged people to watch the proceedings on Fox News and One America News while jabbing at CNN as “Fake News” and apparently mocking MSNBC as “MSDNC” — a likely reference to the Democratic Party.

Trump also hurled insults at lead House impeachment manager Adam Schiff Adam Bennett SchiffTop Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence Overnight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies MORE (D-Calif.), House Speaker Nancy Pelosi Nancy PelosiSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Trump is betting big on the suburbs, but his strategy is failing 'bigly' Trump orders flags at half-staff to honor 'trailblazer' Ginsburg MORE (D-Calif.) and Senate Minority Leader Charles Schumer Chuck SchumerVideo of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral Graham signals support for confirming a Supreme Court nominee this year Pelosi orders Capitol flags at half-staff to honor Ginsburg MORE (D-N.Y.) as well as freshman Democratic Rep. Alexandria Ocasio-Cortez Alexandria Ocasio-CortezLawmakers fear voter backlash over failure to reach COVID-19 relief deal Why Democrats must confront extreme left wing incitement to violence The Hill Interview: Jerry Brown on climate disasters, COVID-19 and Biden's 'Rooseveltian moment' MORE (N.Y.), who has had not formal role on the Senate trial.

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He insulted Ocasio-Cortez as “dumb as a rock” and said she was the “leader” of the other Democrats.

“Our case against lyin’, cheatin’, liddle’ Adam “Shifty” Schiff, Cryin’ Chuck Schumer Chuck SchumerVideo of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral Graham signals support for confirming a Supreme Court nominee this year Pelosi orders Capitol flags at half-staff to honor Ginsburg MORE, Nervous Nancy Pelosi, their leader, dumb as a rock AOC, & the entire Radical Left, Do Nothing Democrat Party, starts today at 10:00 A.M. on @FoxNews, @OANN or Fake News @CNN or Fake News MSDNC!” Trump tweeted less than half an hour before the proceedings were set to begin.

Over the past three days, House Democrats led by Schiff laid out in great detail their case for Trump’s removal from office, presenting evidence they argue clearly supports their allegation that Trump abused the power of his office to pressure Ukraine to announce investigations for his own personal and political benefit.

The president has denied any wrongdoing, and his attorneys — led by White House counsel Pat Cipollone and Trump's personal attorney Jay Sekulow Jay Alan SekulowNow, we need the election monitors Judge denies Trump's request for a stay on subpoena for tax records Judge throws out Trump effort to block subpoena for tax returns MORE — are poised to begin laying out their defense on Saturday.

Trump on Friday complained about the first day of the defense beginning on a Saturday, describing it as “Death Valley” in television. The attorneys are expected to present for a relatively brief period of two to three hours on Saturday before engaging in a more robust presentation when the Senate reconvenes on Monday.

Trump has nothing on his public schedule on Saturday and is likely to be watching the proceedings.