“Late Show” host Stephen Colbert took aim at President Donald Trump’s 2018 budget plan on Tuesday. With the budget proposal outlining a $3.6 trillion reduction in government spending over the next 10 years, Colbert said the cuts set out in the document titled “A New Foundation For American Greatness” would hit Trump’s own voters the hardest. “That foundation of America’s greatness, what’s he building that on?” Colbert asked.