WASHINGTON (AP) — Independents and younger voters propelled Vermont Sen. Bernie Sanders to a victory over former Secretary of State Hillary Clinton in the West Virginia Democratic primary Tuesday night. In a state where a significant portion of Democratic primary voters said they were not Democrats, Sanders was supported by nearly 6 in 10 self-described independents. On the GOP side, presumptive nominee Donald Trump steamrolled through the West Virginia and Nebraska primaries, victories boosted by majorities of Republican voters who say they're optimistic or excited about the possibility of a Trump presidency. About 6 in 10 GOP voters in the state say it's very likely the billionaire would beat Clinton in West Virginia in the general election. Overall, less than 6 in 10 of those voting in that state's Democratic primary say they're Democrats. About two-thirds of the state's Republican primary voters and more than half of Democratic primary voters say trade with other countries mostly takes jobs from American workers. The surveys were conducted for The Associated Press and television networks by Edison Research as voters left their polling places at 25 randomly selected sites in West Virginia and 20 in Nebraska. The results among all those voting in each contest have a margin of sampling error of plus or minus 5 percentage points in West Virginia and plus or minus 4 percentage points in Nebraska.