Retiring Sen. Ben Nelson (D-Neb.) will not endorse former Sen. Bob Kerrey (D-Neb.) in a Democratic primary.
"I usually don't take sides in contested primaries, so that's pretty much where I am," he told The Hill on Tuesday.
Kerrey has long been national Democrats' preferred choice, but after he initially said he wouldn't run, Nebraska Regent Chuck Hassebrook (D) entered the race.
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