Paul Steinhauser and Steve Brusk
[cnn-photo-caption image=http://i.cdn.turner.com/cnn/2010/POLITICS/08/10/primary.votes/story.vote.gi.jpg caption="Four states are picking candidates on Tuesday for Senate and/or governor." width=300 height=169]
President Obama and former President Bill Clinton are on opposite sides of a divisive Democratic Senate primary and a former pro-wrestling executive could take a big step toward winning election to the Senate - those are just two of the storylines as Colorado, Connecticut, Georgia and Minnesota hold primary contests Tuesday.
In Colorado, incumbent Sen. Michael Bennet is battling for his political life as he faces a primary challenge from former state House Speaker Andrew Romanoff. Bennet was plucked out of political obscurity early last year when Colorado Gov. Bill Ritter named him to replace then-Sen. Ken Salazar, who stepped down to serve as interior secretary in the Obama administration. Bennet was superintendent of the Denver school system at the time.
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