Howard County Executive Ken Ulman, center, will join Anthony B. Brown’s gubernatorial ticket on Monday. (Photo by Mark Gail/For The Washington Post)

A leading Republican contender for Maryland governor is set to officially announce his bid on Monday, while a leading Democratic hopeful plans to name his running mate.

Harford County Executive David R. Craig (R) is expected to tout his leadership experience as he makes his 2014 gubernatorial bid official in front of his home in Havre de Grace around 9 a.m.

About the same time, Lt. Gov. Anthony G. Brown (D), who kicked off his campaign for governor last month, plans to announce that Howard County Executive Ken Ulman (D) is joining his ticket as the lieutenant governor candidate.

The busy day in Maryland politics comes about a year before voters in both parties will choose their nominees for the November 2014 election. The winner replaces Gov. Martin O’Malley (D), who is term-limited and weighing a 2016 presidential bid.

In an appearance over the weekend, Craig told a convention of Maryland Young Republicans that the race is winnable despite a more than 2-to-1 advantage that Democrats hold in voter registration.

“If you look back a year ago, how many people thought the Ravens were going to win the Super Bowl?” Craig asked the group, gathered in Rockville.

He also talked up his record in Harford County and took aim at a series of tax increases passed in Annapolis under O’Malley.

The Republican field is likely to get crowded. Del. Ron George (R-Anne Arundel), a jewelry store owner, plans to announce his gubernatorial bid on Wednesday.

Also considering the race: Blaine R. Young, president of the Frederick County Board of Commissioners; Charles Lollar, a businessman who ran unsuccessfully for the 5th Congressional District seat in 2010; Larry Hogan, chairman of Change Maryland and former Cabinet secretary under then-Gov. Robert L. Ehrlich Jr. (R); Brian Vaeth, a retired Baltimore firefighter who ran unsuccessfully for U.S. Senate last year; and Meyer Marks, a political activist from Montgomery County.

Ulman, who had been eyeing his own run for governor, will instead fill the No. 2 slot on Brown’s ticket.

Brown last month became the first Democrat to make his run for governor official.

Attorney General Douglas F. Gansler (D) and Del. Heather R. Mizeur (D-Montgomery) are expected to announce their candidacies in coming months. Rep. C.A. Dutch Ruppersberger (D-Md.) is also considering joining the race.

Both Craig and the Brown-Ulman ticket have several stops planned for Monday after their respective announcements. Craig’s tour will take him to Baltimore and Washington counties. Brown and Ulman have stops planned in Dorchester and Prince George’s counties.