BALTIMORE, Maryland (CNN) -- The campaign of Maryland's Republican governor, Robert Ehrlich, took responsibility Tuesday for a flier that some voters complained was an attempt to falsely suggest Ehrlich and another candidate are Democrats.

The flier, marked "Ehrlich-Steele Democrats Official Voter Guide," included a sample ballot that showed "X" marks next to numerous Democratic candidates, as well as Ehrlich and Lt. Gov. Michael Steele, a Republican who is running for senator.

Some of the fliers included pictures of Ehrlich with Democrats Kweisi Mfume and Prince George's County Executive Jack Johnson, both of whom had endorsed Ehrlich's Democratic opponent, Baltimore Mayor Martin O'Malley.

"It's clearly a deliberate attempt to mislead, and it's unfortunate," The Associated Press quoted Mfume as saying of the fliers.

Shareese DeLeaver, spokeswoman for the Ehrlich campaign, said the brochure was not a "dirty trick," and was a reach-out to Democratic voters led by the group Democrats for Ehrlich, showing people they could choose Democrats for other offices while still supporting Ehrlich and Steele for governor and senator.