The presidential primaries are no longer competitive, but there are three important non-presidential primaries on Tuesday. The first is an Indiana Republican Senate primary in which veteran Senator Dick Lugar's career is on the line. The second is a vote in North Carolina on a proposed constitutional amendment banning gay marriage — as well as civil unions and domestic partnerships. The third pivotal vote of the day is the Democratic primary for Wisconsin's gubernatorial recall election. Melissa Block talks with Ron Elving.
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