Rep. Kendrick Meek (D-Fla.), now running for the Democratic nomination in Florida's Senate race, has been marking his tweets with the hashtag #RealDem — a dig at opponent Jeff Greene.

He first used the marker in a tweet on Aug. 4 announcing the start of his bus tour — the "Real Dem Express" — across Florida.

On Friday morning, Meek announced another campaign event and included the habitual hashtag:

The #RealDem express stops at the Pine Island DEC meeting today @ 11:30a in Davie. http://ow.ly/2p8Oq See you there!

The phrase has been the cornerstone of Meek's campaign, providing a rhetorical foundation for his attacks against Greene — whom he accuses of carpetbagging and participating in fradulent business deals — and even the address for his website, therealdem.com.

Meanwhile, Greene has fired back, calling Meek "corrupt" and an "ineffective legislator" who "does not deserve a promotion to the Senate."

"As more than 1 million Floridians go without work, Kendrick Meek drives around in a $977-per-month leased car and has voted to give himself thousands of dollars in pay increases. Kendrick Meek has not been able to pass ONE single bill into law in his eight years in Congress," one statement read.

The state of the race varies poll to poll. One survey shows a 10-point lead by Greene, and another, a four-point lead by Meek.

Last week, Meek's campaign claimed the two were in a statistical dead heat; the latest, released from Meek's campaign on Thursday, has the congressman leading Greene 38-30 with a 3.5 percent margin of error.

The primary is Aug. 24. The winner will face Florida Gov. Charlie Crist, who is running as an Independent, and Republican Marco Rubio.