Newt Gingrich campaigning in Frederick

FREDERICK, Md. (AP) - Republican presidential candidate Newt Gingrich is campaigning in Frederick ahead of Tuesday's primary.

Gingrich is scheduled to hold a rally at the Frederick Motor Company at 11 a.m. Monday and to speak at Hood College at 2 p.m.

The speech at Hood College is open to the public.

Afterward, Gingrich will meet with student Republicans.

Gingrich has conceded that Mitt Romney is the likely Republican nominee.

His campaign laid off one-third of its staff last week to save money.

Former Pennsylvania Senator Rick Santorum is also vying for the GOP nomination.

Romney is favored to win Tuesday's primaries in Maryland, the District of Columbia and Wisconsin.