Chief Justice John Roberts, who is presiding over President Trump's Senate impeachment trial, declined Thursday to read a question submitted by Sen. Rand Paul, R-Ky. Senate television/AP hide caption

Trump Impeachment Inquiry
Friday
Sen. Lamar Alexander, R-Tenn., arrives for the impeachment trial of President Trump at the Capitol on Friday. Alexander, a key vote in the trial, says he plans to vote no on hearing witnesses. Mandel Ngan/AFP via Getty Images hide caption
Sen. Alexander Explains Decision Not To Call Witnesses In Trump Impeachment Trial
Senate Majority Leader Mitch McConnell, R-Ky., leaves the Senate chamber during a recess in the impeachment trial of President Trump on Friday. Senators voted against admitting witnesses and new evidence on Friday. Drew Angerer/Getty Images hide caption
Thursday
Sen. Lamar Alexander, R-Tenn., announced on Thursday that he will not support allowing witnesses to testify in the impeachment trial of President Trump. Jacquelyn Martin/AP hide caption
White House deputy counsel Patrick Philbin answers a question during the impeachment trial against President Trump. Senate Television via AP hide caption
Chief Justice John Roberts, who reads the questions at the impeachment trial, blocked one query from Sen. Rand Paul, R-Ky., which may have revealed the identity of the whistleblower whose complaint sparked the impeachment inquiry. Senate Television via Getty Images hide caption
Wednesday
Senators are using these cards to hand-write their inquiries during President Trump's impeachment trial. The cards are passed up to Chief Justice John Roberts. J. Scott Applewhite/AP hide caption
The first question in the Senate impeachment trial came from Republican Sen. Lisa Murkowski, in conjunction with fellow moderates Susan Collins and Mitt Romney, on Wednesday. Mario Tama/Getty Images hide caption
Tuesday
A sketch artist's rendering of White House counsel Pat Cipollone speaking in the Senate chamber during the impeachment trial against President Trump on Jan. 21. In the trial, senators play the role of jurors, and Chief Justice John Roberts presides. Dana Verkouteren/AP hide caption
White House counsel Pat Cipollone speaks during the impeachment trial against President Trump in the Senate on Tuesday. Senate Television via Getty Images hide caption
Monday
President Trump points to Sen. Chuck Grassley, R-Iowa, during a trade deal signing ceremony with Chinese officials earlier this month. Steve Helber/AP hide caption
White House counsel Pat Cipollone departs the Senate following defense arguments by the Republicans in the impeachment trial of President Trump. The trial resumed on Monday. J. Scott Applewhite/AP hide caption
Then-National Security Adviser John Bolton at the White House in Washington, D.C., in July 2019. Carolyn Kaster/AP hide caption
Saturday
President Trump's personal attorney Jay Sekulow (center) stands with his son, Jordan Sekulow (left), and White House counsel Pat Cipollone in the Capitol on Saturday. Julio Cortez/AP hide caption
On Friday, Jay Sekulow, personal attorney for President Trump, said Saturday's presentation was expected to set the stage for the "coming attractions." Sarah Silbiger/Bloomberg via Getty Images hide caption