Voters in 11 states cast ballots in primary elections Tuesday, giving new signals about the reach of an anti-Washington, anti-incumbent tide that has left its mark on earlier races this year.

In Arkansas, Sen. Blanche Lincoln is scrambling to avoid becoming the third incumbent senator this season to be defeated by her own party. Six-term Rep. Bob Inglis of South Carolina may be forced into a runoff. In Nevada, Republican voters may reject a mainstream GOP candidate and instead back a conservative firebrand to challenge Senate Majority Leader Harry Reid. But in sprawling California, two corporate executives tapped by Republican leaders to launch high-profile races have solidified their positions.

Below are some of the highlights of the busiest primary election day so far.

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