TALLAHASSEE, Fla. -- Polls are open across much of Florida, where a light voter turnout is expected in the state's primary election.

Duval County polls opened at 7 a.m. with no problems with any of the voting machines, Jerry Holland, Duval County Supervisor of Elections said.

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Holland said in the first half hour the polls were open 100 people voted.

Despite the quick number of people casing their ballots, Holland said he expects only about a 23% turnout, which is higher than the 2008 primary election.  Holland said that percentage also includes early voting and absentee ballots.
    
A Republican U.S. Senate showdown highlights Florida's primary Tuesday.
    
Republicans will choose between U.S. Rep. Connie Mack IV, former Congressman Dave Weldon and tea party favorite Mike McCalister in the GOP Senate race. Democrats and Republicans are also voting in primaries for congressional, legislative and local races.
    
Mack is a heavy favorite. His father, Connie Mack III, is a former senator and his great-grandfather was a Hall of Fame baseball manager and he has benefited from a better-financed campaign. The winner faces Democratic incumbent Bill Nelson in November.
    
Nelson is seeking a third term in the U.S. Senate. Nelson holds the seat that Mack's father had for two terms before retiring.

Associted Press