With the Pentagon’s base budget — which does not include war costs — forecast to hit 3.5% of GDP in 2013, a jump to 4% would mean an increase of around $100 billion dollars in defense spending in 2013. […]

Compared to the Pentagon’s current budget, Romney’s plan would lead to $2.1 trillion in additional spending over the next ten years, according to an analysis conducted for CNNMoney by Travis Sharp, a budget expert at the Center for a New American Security.