The news, first reported by The New York Times Sunday night, that President Donald Trump had told national security adviser John Bolton directly to continue to withhold approved military aid to Ukraine until that country agreed to announce investigations into Democrats, and specifically former Vice President Joe Biden, is an absolute bombshell with the very real possibility of fundamentally altering the calculus for Republican senators in the ongoing impeachment trial.

An explosive New York Times report detailing an unpublished draft manuscript by former national security adviser John Bolton has added new uncertainty to this week's crucial vote to determine whether the Senate should subpoena witnesses and documents in President Donald Trump's impeachment trial, several GOP sources said.

Some time in the next few days, the Senate is likely to give Donald Trump what he most craves — an acquittal in his impeachment trial. A late breaking report that John Bolton has information that implicates the US President could see the former national security adviser called to testify. In the slim chance that four Republicans defy their party and vote to hear more witnesses, the process may take slightly longer, but either way, acquittal is a forgone conclusion: The President's hold on grassroots conservative voters make it electoral suicide for members of the Senate's Republican majority to convict him. Here's what will happen next:

Republican lawyers did little Saturday to refute the case against Donald J. Trump laid out earlier this week by House managers, who deftly demonstrated that there is concrete evidence of wrongdoing. Democrats pulled out all of the key evidence, from official transcripts, to footage of the testimonies of key witnesses, to videos of Trump corroborating their arguments in his own words.

CNN's Brian Stelter says pro-Trump media coverage of the President's impeachment trial is trying to filter what viewers see.

Lead House impeachment manager Rep. Adam Schiff on Sunday called President Donald Trump "wrathful and vindictive," adding that he thought a morning tweet by the President was intended to intimidate him.

"Milking" impeachment for oddball moments. CNN's Jeanne Moos has impeachment follies.

On the final day of the opening argument to remove President Donald Trump from office, the lead impeachment manager, Rep. Adam Schiff of California, first turned to the little known Rep. Jason Crow of Colorado.

President Donald Trump's legal team opened its defense Saturday by focusing -- mainly -- on pushing back against the two articles of impeachment levied against him: abuse of power and obstruction of Congress. White House counsel Pat Cipollone, who led the team, maintained a calm, measured demeanor -- in marked contrast to the accusatory, aggrieved tone he and his colleagues adopted during last week's highly charged procedural debate.

Sen. Mitt Romney said Saturday that it's "very likely" that he'll be in favor of calling witnesses in the impeachment trial of President Donald Trump, but won't decide until after opening arguments.