Updated at 5:25 p.m. ET
With just hours to go before the official announcement, President Trump has made a decision on his pick for the next Supreme Court justice, a source close to the decision-making process tells NPR's Mara Liasson.
But there is still no indication which of the four finalists it will be.
As of Monday morning, Trump was still deciding among Judges Thomas Hardiman, Brett Kavanaugh, Raymond Kethledge and Amy Coney Barrett.