Here are our top picks for local stories to start your day:

Jessica Port, left, and her wife, Virginia Anne Cowan, are attempting file for divorce in the state of Maryland, where same-sex marriage will not become legal until the start of 2013. (Steve Ruark/AP)

Maryland’s controversial income tax hike and a bill allowing a new Prince George’s casino collapsed Monday, failing to get a vote before the state’s General Assembly before its official session ended. The legislature probably will hold a special session to consider the measures.

Rep. Jim Moran (D-Va.) will have a primary challenger after all, as the Virginia Democratic Party certified Navy veteran Bruce Shuttleworth to appear on the June 12 ballot. The party initially ruled Shuttleworth had failed to submit enough valid signatures.

Coming up on PostLocal:

— The Post’s Tom Boswell will be online at 11 a.m. to take all your questions on the Masters, Nats and the rest of the D.C. sports scene.

— Want to know what your friendly neighborhood squirrels are chattering about? Squirrel vocalization expert Robert Lishak will be live with The Post at 11 a.m. to discuss squirrel speech.