Olga Balashova / AP

Russia's defense ministry said Monday that it will treat U.S.-led coalition planes west of the Euphrates in Syria as targets after the U.S. downed a Syrian jet over the weekend, bringing an end to the agreement between the U.S. and Moscow, reports FT.

The no-fly zone demanded by Russia: Key cities like Aleppo and Damascus would be out of bounds for coalition aircraft. Most Kurdish and ISIS territory would not. (Go deeper with this map by Axios' Lazaro Gamio.)

Why it matters: The incident is the first time the U.S.-led coalition has shot down a Syrian plane since the beginning of the country's civil war six years ago. Moscow denounced the action as a violation of international law and has reportedly suspended its incident-prevention hotline with the U.S. in Syria in retaliation, per AFP.

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Durbin on Barrett confirmation: "We can’t stop the outcome"

Senate Minority Whip Dick Durbin (D-Ill.) said on ABC's "This Week" that Senate Democrats can “slow” the process of confirming Supreme Court nominee Amy Coney Barrett “perhaps a matter of hours, maybe days at the most," but that they "can’t stop the outcome."

Why it matters: Durbin confirmed that Democrats have "no procedural silver bullet" to stop Senate Republicans from confirming Barrett before the election, especially with only two GOP senators — Lisa Murkowski of Alaska and Susan Collins of Maine — voicing their opposition. Instead, Democrats will likely look to retaliate after the election if they win control of the Senate and White House.

The top Republicans who aren't voting for Trump in 2020

Photo: Brendan Smialowski/AFP via Getty Images

Former Pennsylvania Gov. Tom Ridge announced in an op-ed Sunday that he would be voting for Joe Biden.

Why it matters: Ridge, who was also the first secretary of homeland security under George W. Bush, joins other prominent Republicans who have publicly said they will either not vote for Trump's re-election this November or will back Biden.

Former GOP governor of Pennsylvania Tom Ridge endorses Joe Biden

Tom Ridge. Photo by Drew Angerer/Getty Images

Tom Ridge, the former Republican governor of Pennsylvania, will vote for Joe Biden, he announced in a Philadelphia Inquirer op-ed on Sunday.

Why it matters: Ridge, who also served as the first Secretary of Homeland Security under George W. Bush, said this would be his first time casting a vote for a Democratic candidate for president. He's now the third former Republican governor from a swing state to endorse Biden and reject Trump — joining John Kasich from Ohio and Rick Snyder from Michigan.