For the past few weeks, Democrats and Republicans were closing in on a game-changing deal to secure the U.S.-Mexico border: a bipartisan compromise that’s unheard-of in contemporary Washington.

Karoun Demirjian, who covers Congress for The Times, explains why that deal is now falling apart.

Guest: Karoun Demirjian, a congressional correspondent for The New York Times.

Background reading: 

• Divided Republicans coalesced behind a bit of legislative extortion: No Ukraine aid without a border crackdown. Then they split over how large a price to demand, immigration-ukraine-republicans-biden.html?smid=pc-thedaily">imperiling both initiatives.
• Republicans and Democrats have agreed to try to reduce the number of migrants granted parole to stay in the United States, but cementing the compromise deal-parole-money-senate-talks.html?smid=pc-thedaily">will take money and persuasion on both sides.

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