Florida Senate candidate Kendrick Meek’s (D) campaign canceled a planned conference call with reporters Monday so he could cast an early ballot.

After voting at his precinct in Miami-Dade County, Meek encouraged supporters to vote for "the only real Democrat" in the race. He faces a challenge from real estate mogul Jeff Greene (D), with different polls showing each candidate in the lead. 

Early voting runs through Aug. 21 in some counties and Aug. 22 in others. A spokeswoman for the Florida Department of State said it wouldn't predict how many voters will cast ballots before the Aug. 24 primary day. Early voting was instituted in Florida in 2004.  

The Meek campaign also released the script of a robocall made on his behalf by Bob Graham, the former governor and senator. 

"I know what it takes to get the job done for Florida, and I know Kendrick will get it done because he's a hard worker and knows what everyday Floridians are going through," Graham said the recording. "And, he's the only real Democrat in the race. All the other major candidates have run as Republicans. Please vote for my friend Kendrick Meek."

Greene also built events around early voting. His campaign organized a conference call Sunday that drew 7,800 supporters, according to a spokesman.

Meanwhile, Greene faces more negative coverage of his vast real estate holdings. Residents at the The Oasis, an apartment complex near Los Angles that Greene owns, complained about maintenance. "He needs to treat us better," one resident told the St. Petersburg Times

In response, the Meek camp launched the website, SlumlordBillionaire.com.

--Updated at 10:42 p.m.