Hurricane Sandy is disrupting presidential politics in Virginia, even before the so-called “frankenstorm” hits the  battleground state.

Republican Mitt Romney’s campaign has canceled a Sunday night rally in Virginia Beach because of the approaching storm. The Virginia Beach stop was to be the last of three Romney campaign events in the state on Sunday, when Sandy is expected to bring heavy rains and high winds to Virginia. Gov. Bob McDonnell this morning declared a state of emergency and warned Virginians to prepare for a devastating storm.

Romney’s campaign said it will proceed with Sunday rallies in Prince William County and at the University of Richmond and will reschedule the Virginia Beach event.

President Barack Obama is scheduled to campaign in Prince William County on Monday with former President Bill Clinton.

But if this storm is as severe as forecasts project, those events might also get frankenstormed.

Update (5:47 p.m.): Obama’s campaign has cancelled Vice President Joe Biden’s Saturday visit to Virginia Beach “out of an abundance of caution to ensure that all local law enforcement and emergency management resources can stay focused on ensuring the safety of people who might be impacted by the storm.”

Biden’s Saturday afternoon event in Lynchburg will proceed as scheduled.

– Michael Sluss