The United States attacked three sites in Iran Sunday, inserting itself into Israel’s war aimed at destroying the Iranian nuclear program.

After the U.S. dropped bunker busters on Iran’s nuclear sites, Tehran fired off missile barrages at Israel, kicking off a brutal exchange that’s drawn in Washington, rattled the region, and made clear this fight is only getting hotter.

After nearly two years of stark divisions over the war in Gaza and support for Israel, Democrats seemed at odds over policy toward Iran as progressives demanded unified opposition before President Donald Trump announced U.S. strikes against Tehran’s nuclear program. Party leaders were treading more cautiously.