Barack Obama: “A united and prosperous Europe is of enormous interest and importance--indeed vital importance--to the United States.”

Your task is not to impose litmus tests.

No one was more skilled at bringing people together and getting legislation passed.

They're meant to remind us of who we can be, to remind us of what's possible, so we can forge ahead.

Every president here today, as different as we are, has tried our best to uphold the values that John McCain and Mitt Romney believed in no less than I did.