A Democratic push to force Republicans to accept witnesses at President Donald Trump's impeachment trial in the U.S. Senate appeared to be flagging on Wednesday, raising the possibility he could be acquitted as early as Friday.

A Democratic push for witnesses at Donald Trump's U.S. Senate impeachment trial appeared to flag on Wednesday, raising the possibility the president could be acquitted as early as Friday, as the White House objected to the publication of a book by former national security adviser John Bolton.

A Democratic push to force Republicans to accept witnesses at Donald Trump's impeachment trial in the U.S. Senate appeared to be flagging on Wednesday, raising the possibility the president could be acquitted as early as Friday.

The White House on Wednesday objected to the publication of a book by President Donald Trump's former national security adviser John Bolton depicting Trump as playing a central role in a pressure campaign on Ukraine, while members of the U.S. Senate asked a spree of questions in the impeachment trial.

U.S. Republican Senator John Barrasso, a member of the Senate Republican leadership, told reporters on Wednesday that Republicans seemed to have the "momentum" to move to end the impeachment trial of President Donald Trump by Friday, without calling witnesses.

President Donald Trump's impeachment trial entered a new phase on Wednesday as the White House objected to a book written by his former national security adviser, John Bolton, depicting the Republican leader as playing a central role in a pressure campaign on Ukraine. [L1N29Y02A]

Lev Parnas, an indicted businessman who says he worked to pressure Ukraine to investigate one of President Donald Trump's political rivals, traveled to Washington to press the Senate to allow him to testify in Trump's impeachment trial, only to be turned away at the U.S. Capitol.

The White House on Wednesday objected to the publication of a book written by President Donald Trump's former national security adviser John Bolton that depicts Trump as playing a central role in a pressure campaign on Ukraine, as the Senate impeachment trial entered a new phase.

U.S. Republican Senator Cory Gardner said on Wednesday he does not support calling witnesses in the impeachment trial of President Donald Trump, the Colorado Politics website reported.

President Donald Trump launched his sharpest attack yet on John Bolton on Wednesday after his former national security adviser depicted him as playing a central role in a pressure campaign on Ukraine, while an indicted businessman linked to the scandal created a spectacle arriving for Trump's impeachment trial.