A fierce political battle shaped up over the future of the U.S. Supreme Court on Saturday, with President Donald Trump saying he would quickly name a successor to liberal Justice Ruth Bader Ginsburg, a move that would tip the court further to the right.

“We were put in this position of power and importance to make decisions for the people who so proudly elected us, the most important of which has long been considered to be the selection of United States Supreme Court Justices,” Trump said on Twitter. “We have this obligation, without delay!”

Ginsburg, the senior liberal justice, died on Friday night at age 87 of complications from metastatic pancreatic cancer after 27 years on the court. Her death gives Trump, who is seeking re-election on Nov. 3, a chance to expand the court’s conservative majority to 6-3 at a time of a gaping political divide in America.

Trump’s short list of potential nominees includes two women jurists: Amy Coney Barrett and Barbara Lagoa, according to a source close to the White House.

Democrats are still seething over the Republican Senate’s refusal to act on Democratic President Barack Obama’s Supreme Court nominee, Merrick Garland, in 2016 after conservative Justice Antonin Scalia died 10 months before that election. McConnell in 2016 said the Senate should not act on a court nominee during an election year, a stance he has since reversed.

Despite that anger, Democrats have little chance of blocking Trump’s pick. His fellow Republicans control 53 of the Senate’s 100 seats and Senate Majority Leader Mitch McConnell, who has made confirmation of Trump’s federal judicial nominees a top priority, said the chamber would vote on any Trump nominee.

Obama himself on Saturday called on Senate Republicans to honor what he called that “invented” 2016 principle.

Trump mulling Appeals Court judges Barbara Lagoa, Amy Coney Barrett for Supreme Court – sourceMourners across the United States honor trailblazer Ginsburg

“A basic principle of the law — and of everyday fairness — is that we apply rules with consistency, and not based on what’s convenient or advantageous in the moment,” Obama said in a statement posted online. “The rule of law, the legitimacy of our courts, the fundamental workings of our democracy all depend on that basic principle.”

POTENTIAL NOMINEES

Even before Ginsburg’s death, Trump had made public a list of potential nominees.

Barrett has generated perhaps the most interest in conservative circles. A devout Roman Catholic, she was a legal scholar at Notre Dame Law School in Indiana before Trump appointed her to the Chicago-based 7th Circuit in 2017. A Barrett nomination would likely ignite controversy, as her strong conservative religious views have prompted abortion-rights groups to say that if confirmed by the Republican-led U.S. Senate, she would likely vote to overturn the landmark 1973 Roe v. Wade Supreme Court decision that legalized abortion nationwide.

Lagoa has served on the 11th U.S. Circuit Court of Appeals for less than a year after being appointed by Trump and confirmed by the Senate on an 80-15 vote. Prior to that she also spent less than a year in her previous position as the first Latina to serve on the Florida Supreme Court. She previously spent more than a decade as a judge on an intermediate appeals court in Florida.

Conservative activists for years have sought to get enough votes on the Supreme Court to overturn Roe v. Wade. During the 2016 campaign, Trump promised to appoint justices who would overturn that decision. But the court in July, even with its conservative majority, struck down a restrictive Louisiana abortion law on a 5-4 vote.

The two justices already appointed by Trump were Neil Gorsuch in 2017 and Brett Kavanaugh in 2018. Kavanaugh’s confirmation process was particularly heated, as he faced accusations by a California university professor, Christine Blasey Ford, that he had sexually assaulted her in 1982 when the two were high school students in Maryland. Kavanaugh angrily denied those accusations and was narrowly confirmed.

SENATE CHALLENGE

Republicans risk the possibility of liberals embracing more radical proposals should Trump replace Ginsburg but Democrats win November’s election, with some activists on the left suggesting even before Ginsburg’s death that the number of justices on the court should be expanded to counter Trump’s appointees.

Confirmation votes could also put more pressure on incumbent Republican senators in highly competitive election races, including Maine’s Susan Collins and Arizona’s Martha McSally, at a time when Democrats are eying a chance to win control of that chamber. Senator Lisa Murkowski of Alaska also could play a pivotal role.

Many court-watchers expect Trump to attempt to replace Ginsburg with a woman. One possible contender on Trump’s list is Amy Coney Barrett, a conservative judge on the Chicago-based 7th U.S. Circuit Court of Appeals who was under consideration in 2018 before Trump picked Kavanaugh.