The president and first lady will meet with Gold Star families before each event, and the vice president and his wife will attend an event Friday to honor military families who lost a relative on active duty.

Mitt Romney, meanwhile, will hold a Memorial Day tribute with Sen. John McCainJohn Sidney McCainGOP rushes to cut ties to Moore GOP strategist: 'There needs to be a repudiation' of Roy Moore by Republicans World leaders reach agreement on trade deal without United States: report MORE (R-Ariz.) at the Veterans Museum & Memorial Center in San Diego on Monday.

McCain, the 2008 Republican presidential nominee and a prominent Romney backer, was a Navy captain who was captured and held as a prisoner of war during the Vietnam War. San Diego is the host to the largest naval fleet in the world.