Thousands of Republican voters crowded into local caucuses Saturday in Washington state to pick a GOP presidential nominee in a race whose outcome is tough to predict – and will be watched closely as a preview of next week’s Super Tuesday.

All four contenders visited Washington in the last two weeks, hoping the caucuses would give them an important jolt of momentum three days before 10 states, including neighboring Idaho, vote on the biggest primary and caucus day of the year.

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