"A candidate for this important position who would overturn Roe v. Wade would not be acceptable to me because that would indicate an activist agenda that I don't want to see a judge have. That would indicate to me a failure to respect precedent," Collins said Sunday on ABC's "This Week."
[Ads /]
Collins called the ruling "settled law," pointing out that it was reaffirmed under the Fourteenth Amendment in the 1992 Planned Parenthood v. Casey ruling.
Trump has said he will pick a nominee by July 9 from a list of 25 judges. Trump's nominee must eventually be approved by a full Senate vote; though she is a member of the Republican party, Collins has been known to cross party lines and proven to be a pivotal vote in a Senate with a razor-thin party margin.
[Ads /]
MORE: How a new Supreme Court justice gets on the bench
Supreme Court nomination process: How a new justice gets confirmed
The Associated Press contributed to this report.