(CNN) - Voters in Washington state and Wyoming picked their candidates for the general election, setting the stage for some potential nail biters in November.
In Washington, Democratic Sen. Patty Murray and Republican candidate Dino Rossi emerged from a crowded primary field.
Murray, the incumbent, received 46 percent of the vote and Rossi got just under 34 percent, according to the Washington secretary of state. Under the state's system, the two candidates who receive the most votes regardless of party affiliation move on to the general election. Washington is primarily a mail-in ballot state, and voting was under way for two weeks.
In many ways, Murray and Rossi had already begun their general election campaigns before the primary, focusing their attacks on each other. Polls show a close race in the fall.