President Obama spoke to a crowd of students about college affordability during a visit to the University of Michigan on Friday morning. It was the final stop on his post-State of the Union tour to promote his "America, Built to Last" economic policies. "College is the single most important investment you can make in your future, and I'm proud all of you are making that investment," he told the cheering crowd. He called on Congress to stop interest rates on student loans from increasing; to extend the tuition tax credit, and double the number of work-study jobs in the next five years. The President also announced the launch of a "race to the top for college affordability," that will reward colleges and universities that keep tuition costs down. "If you can't stop tuition from going up," Obama said, "the funding you get from taxpayers will go down."