A suspect was arrested for allegedly "sending a suspicious letter" after law enforcement agents intercepted an envelope addressed to President Trump containing the poison ricin, the FBI confirmed in an emailed statement to Axios Sunday.

Details: The suspect, a woman, was arrested while trying to enter New York from Canada, law enforcement sources said.

A majority of Americans, including many Republicans, want the winner of the November presidential election to nominate the next Supreme Court justice, according to a Reuters/Ipsos poll published on Sunday.

Why it matters: Senate Majority Leader Mitch McConnell said soon after the news of Ruth Bader Ginsburg's death that President Trump's nominee would get a vote on the Senate floor. But since then, two Republicans — Sen. Lisa Murkowski (R-Alaska) and Sen. Susan Collins (R-Maine) — have said they oppose holding a vote before Election Day.

House Speaker Nancy Pelosi said on ABC's "This Week" on Sunday that President Trump is rushing to replace the late Supreme Court Justice Ruth Bader Ginsburg because he "wants to crush the Affordable Care Act."

Why it matters: Pelosi wants to steer the conversation around the potential Ginsburg replacement to health care, which polls show is a top issue for voters, especially amid the coronavirus pandemic. The Trump administration has urged the courts to strike down the law, and with it, protections for millions with pre-existing conditions.

Sen. Ted Cruz (R-Texas) argued on ABC's "This Week" Sunday that Republicans should vote on President Trump's nominee to fill Justice Ruth Bader Ginsburg's seat on the Supreme Court, calling it a "question of checks and balances."

The backdrop: Republicans stonewalled President Obama's nomination of Merrick Garland following Justice Antonin Scalia's death in 2016, claiming that voters should decide in the election who is appointed to the court. Cruz said the circumstances are different now because Republicans control the Senate and the White House, whereas Democrats were in the minority when former President Obama nominated Garland.

President Trump said during a Fayetteville, North Carolina, rally Saturday he'll announce a nominee for Justice Ruth Bader Ginsburg's vacant Supreme Court seat "next week" and "it will be a woman."

Details: Trump told reporters earlier, "The choice of a woman, I would say, would certainly be appropriate."

President Trump wrote in a tweet Saturday morning that Republicans have an "obligation" to fill Justice Ruth Bader Ginsburg's seat on the Supreme Court following her death Friday.

What he's saying: "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," the president said, tagging the Republican Party. "We have this obligation, without delay!"

President Trump said Supreme Court Justice Ruth Bader Ginsburg "led an amazing life," after he finished a campaign rally in Bemidji, Minnesota, and learned of her death.

What he's saying: "I’m sad to hear,” Trump told the press pool before boarding Air Force One. "She was an amazing woman, whether you agree or not, she was an amazing woman who led an amazing life."

Negotiations on a deal between the White House and pharmaceutical industry to lower drug prices broke down last month after Mark Meadows, the president's chief of staff, insisted that drugmakers pay for $100 cash cards to be mailed to seniors before the election, according to the New York Times.

Why it matters: Some of the drug companies feared that in agreeing to the prescription cards — reportedly dubbed "Trump Cards" by some in the pharmaceutical industry — they would boost Trump's political standing weeks ahead of Election Day with voters over 65, a group that is crucial to the president's reelection bid, per the Times.

Three years after Hurricane Maria devastated Puerto Rico, the White House on Friday authorized $11.6 billion in federal aid and FEMA grants to rebuild infrastructure on the island.

Why it matters: Throughout his presidency, Trump has resisted giving Puerto Rico any more federal money for its recovery from Hurricane Maria. The White House touted the grants announced Friday as some of the largest in FEMA's history.

Four Democratic House committee chairs on Friday asked the Justice Department's inspector general to launch an "emergency investigation" into whether Attorney General Bill Barr and U.S. Attorney John Durham, his appointee, are taking actions that could "improperly influence the upcoming presidential election."

Catch up quick: Last year, Barr tapped Durham to conduct a sweeping investigation into the origins of the FBI's 2016 Russia probe, after he and President Trump claimed that it was unjustified and a "hoax."