None of the judges named is older than 53, meaning any of them could sit on the court for several decades, allowing Trump to make a lasting imprint on the nation's laws.
But the four judges who are apparently the finalists for President Donald Trump's second Supreme Court nomination are being measured against a set of questions that go well beyond age and ideology.
Trump has been uncharacteristically circumspect about what he is thinking as the process has unfolded.
Among the 10 Democratic senators facing voters in Trump states, three will confront especially hard decisions: Heidi Heitkamp of North Dakota (which Mr. Trump carried with 63 per cent of the vote), Joe Manchin III of West Virginia (69 per cent) and Joe Donnelly of in, home state of Vice-President Mike Pence (57 per cent).
Hardiman has a tale Republicans like McConnell love: a former taxi driver from the key swing state of Pennsylvania who comes with the recommendation of fellow 3rd Circuit Court of Appeals Judge Maryanne Trump Barry - the president's sister. She no longer hears cases.
Federal judge Brett Kavanaugh is often mentioned as being the one candidate who checks all the boxes important to Trump.
"If the president came out and said I'm nominating Thomas Jefferson, the Democrats would object".
FILE PHOTO: The U.S. Supreme Court is seen as the court nears the end of its term in Washington, U.S., June 11, 2018. A former aide to a Republican senator, Kethledge also previously worked as an in-house lawyer for Ford Motor Co.
Barrett has a thin resume as a judge but has amassed a formidable and respected body of scholarly work. Barrett, a married mother of seven and a devout Roman Catholic, is a favorite among social conservatives and conservative Christian leaders.
The appointment will not change the ideological breakdown of a court that already has a 5-4 conservative majority, but nevertheless could move the court to the right. Democrats are voicing alarm about what the new justice could mean for charged issues such as abortion rights and gay rights.
The announcement is planned for Monday, July 9 at 9 p.m. ET (8 p.m. CT).
Democrats - unable to block the nominee unless they lure some Republican senators to their side - have stressed the high stakes of the president's decision as they prepare for the confirmation battle ahead.
With the Senate's Republican leadership saying it aims to complete the confirmation process before November's midterm elections, Democrats were nearing panic mode.
A half-hour after Trump is scheduled to appear with his choice in an East Room ceremony, Demand Justice, MoveOn, Indivisible, and People for the American Way will gather at the Supreme Court for a rally in opposition. The Gorsuch nomination replaced a conservative, Antonin Scalia, with another conservative, and thus did not alter the precarious balance in the chamber. Trump has since downplayed those remarks, indicating in a recent interview with Fox News that his advisors have discouraged him from asking potential nominees outright if they would vote to overturn the Roe precedent.