Susan Rice considering 2020 challenge to Collins in Maine.

FILE - In this July 7, 2016, file photo, then-National Security Adviser Susan Rice follows then-President Barack Obama across the South Lawn of the White House in Washington, to board Marine One. On Sunday, Oct. 7, 2018, Rice said she’ll decide after the midterm elections whether to run for the Senate from Maine in 2020. Rice is weighing whether to try to unseat Republican Sen. Susan Collins, whose decision to support Brett Kavanaugh was key to his confirmation to the Supreme Court. (AP Photo/Carolyn Kaster, File)

WASHINGTON (AP) — Susan Rice, who was President Barack Obama's national security adviser, said Sunday she'll decide after next month's midterm elections whether to run for the Senate from Maine in 2020 and try to unseat Republican Sen. Susan Collins.

Collins cast a deciding vote to confirm Brett Kavanaugh to the Supreme Court, deeply disappointing those opposed to his nomination.

Speaking in New York during The New Yorker Festival, Rice said Collins "put party and politics over her own stated principles" of supporting equal rights and legalized abortion. "I think in a way that I really regret saying, she has betrayed women across this country," Rice said.

Full story at Yahoo News.