PBS/NPR/Marist poll: 56% of Americans oppose US military action in Iran, 44% support. 54% disapprove of Trump's handling; only 36% approve (down 6pts from 2020 Soleimani strike). Sharp partisan divide: 84% of Republicans back strikes, 86% of Democrats oppose. Internal Pentagon memo (Politico) suggests war could last months vs White House 4-6 week claim. Source: PBS NewsHour.