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With customary fanfare, Trump unveiled his choice to replace retiring Justice Anthony Kennedy on prime-time TV.
Trump is said to have apparently lost interest in Kethledge.
Pres. Bush nominated Kavanaugh to the D.C. Appeals Court in 2003, but he was not confirmed until May 2006.
Three Senate Democrats voted to confirm Trump's first Supreme Court nominee, Neil Gorsuch, in April 2017: Joe Donnelly of Indiana, Heidi Heitkamp of North Dakota and Joe Manchin of West Virginia. The ads, costing a total of $1.4 million to run, will feature biographical information about the nominee and will be aimed at red state Democrats, including newly elected Sen.
Neil Gorsuch, 50, who was appointed by Mr Trump a year ago, is already one of the most conservative of the court's nine justices.
At the top of issues that will be closely watched is abortion.
By Monday Barrett, at 46 the youngest and the only woman of the four, was being widely discounted due to her relative inexperience and her strong views as a social and religious conservative. Kennedy provided a decisive vote in 2015 on an important fair housing case.
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We should be grateful of the side of the draw we're on and grateful for the spirit and performances they're putting in. The iconic Black Prince statue in City Square is now holding an England flag and its very own football.
Trump is hoping to replicate his successful nomination of Justice Neil Gorsuch past year.
The president has spent the days leading up to the decision mulling the pros and cons of the various options with aides and allies.
Throughout the search for Trump's second Supreme Court nominee, Kavanaugh was a favorite of the conservative legal cognoscenti. Democrats are already mobilizing against the possible contenders, arguing that his choice could help undermine abortion rights, healthcare protections, marriage equality, affirmative action and a host of other issues in ways that could fundamentally reshape American life.
But his work on President Bill Clinton's impeachment, his close ties to President George W. Bush and his ruling on President Barack Obama's health care law, which he opposed on procedural rather than broader legal grounds, have raised concerns among some conservatives.
A fellow judge there, Maryanne Trump Barry, one of the president's sisters, reportedly has recommended him to her brother.
A graduate of Yale University and Yale Law School, Kavanaugh - the only one of Trump's four finalists who has an Ivy League degree - will be in good company on a court where all the current justices have gone to law school at Harvard or Yale.
MCCAMMON: Well, the other two names that we're hearing a lot about are Thomas Hardiman, another federal appeals judge who was a runner-up to Justice Neal Gorsuch the last time around. Many preferred one of the candidates who had worked outside Washington, despite their less sterling resumes.
Kethledge, another former clerk to Kennedy, is a judge on the U.S. Court of Appeals for the 6th Circuit in Cincinnati. The liberals' effort probably will focus on moderate GOP senators, such as Maine's Susan Collins and Alaska's Lisa Murkowski, who might be wary of adding a hard-line conservative and risking decades-old precedents such as Roe v. Wade, which legalized abortion in 1973.