Romney releases doctor's letter, says he's healthy

Mitt Romney's presidential campaign has released a letter from his doctor saying he's healthy and physically fit to meet the rigorous demands of a presidency. 

In Friday's release, Romney's longtime physician says his heart is healthy, and he takes a baby aspirin and cholesterol medicine to help keep it that way. He doesn't smoke or drink, or have any serious illnesses. 

The campaign also released a health summary for his running mate, Paul Ryan, that declares his health excellent. 

Ryan's doctor says he exercises vigorously, doesn't smoke, and uses alcohol infrequently. He pays close attention to cardiac health because of a family history of heart disease. 

Presidential and vice presidential candidates routinely release summaries of their medical standing. The White House releases results from President Obama's annual physical.