Alarm Over Invasion Ticks Up: As the situation in Ukraine escalates with sham referendums and Russian President Vladimir Putin’s nuclear threats, the share of U.S. voters who are at least “somewhat concerned” about the conflict has increased over the past two weeks, from 77% to 83% — the highest recorded since mid-July. Independents and Republicans (21% each) are almost twice as likely as Democrats (12%) to say they’re not concerned about Russia’s invasion.

But Americans Are Divided Over America’s Obligation to Ukraine: While 41% of U.S. voters say their government has a responsibility to protect and defend Ukraine from Russia, 39% say it doesn’t. There’s a partisan divide on the question, with 52% of Democrats seeing such an obligation to Ukraine, compared with 33% of Republicans.

Few Americans Say U.S. Isn’t Doing Enough for Ukraine: Just 22% of U.S. voters say their country isn’t doing enough to halt Russia’s invasion, down from a 37% high set in early March at the outset of the war. At 52%, Democrats are most likely to say the Biden administration is doing “the right amount” to stop the invasion, compared with 38% of independents and 37% of Republicans who agree.