Collins, who appeared on ABC's "This Week" and CNN's "State of the Union", said she would only back a judge who would show respect for settled law such as the Roe decision, which has always been anathema to conservatives.
"I think it's questionable we should be considering a nominee from a president who has a history of demanding these loyalty tests and we could be responsible for participating in something that could undermine that investigation", Booker told the committee.
President Trump has interviewed seven potential candidates as he looks to quickly fill the Supreme Court vacancy left by the retirement of Justice Anthony Kennedy. Anti-abortion conservatives, mostly Republicans, have long opposed the ruling.
Trump said Sunday he believes his nominee, which he has said he will announce July 9, will be confirmed quickly. He did not identify any of them.
What I want to see is a nominee who, regardless of his or her personal views on the very hard and contentious life issue, is going to respect precedent. "I also suggested that he broaden his search".
Shortly after he was elected in 2016, in an interview with CBS's "60 Minutes", Trump said "I'm pro-life".
#WC2018: Big guns primed for quarter-final battles
He added that he did not see consistency in Croatia's game as they "looked good for three games but played worse against Denmark". " England have a great chance to make a World Cup semi-final". "I think England can go very far in this tournament".
The Senate would have to confirm the nominee.
If Trump chooses a strongly anti-abortion nominee who favored overturning Roe v. Wade, Collins and Murkowski might withhold their support. Meanwhile, just 33 percent of respondents said they want to see the vote postponed until after the elections.
As a result, the focus has turned to Democratic Senators Joe Manchin of West Virginia, Joe Donnelly of IN and Heidi Heitkamp of North Dakota. Nii Ashie Kotey (former Dean, Faculty of Law, University of Ghana, Legon) and Nene A.O. Amegatcher (private legal practitioner and former President of the Ghana Bar Association).
Some conservatives have pointed to Kethledge as a potential justice in the mold of Trump-appointed Justice Neil Gorsuch; both once served as law clerks to Kennedy. They were the only Democrats to do so.
Kennedy is a conservative but has at times sided with the liberals on the court in key decisions, including decisions on the death penalty, abortion, and same-sex marriage. Tim Kaine said the future of Roe v. Wade is "very much in jeopardy" during a campaign event on Monday morning in Town Center.
He said, "Roe v Wade has been affirmed over the years ..." Using that number for Trump's appointment, the average age of Republicans could drop to 60.6 years, making the conservative side of the bench more than 10 years younger, on average, than the liberal side. Though the court said park rangers had violated his free speech rights, the case was not about the right to abortion itself.