Barack Obama: “Your experience cautions that progress is neither easy nor quick.”

The success of this experiment was never a given.

a belief that our military and law enforcement owe allegiance not to any president or political party, but to the people and our constitution … a belief in the peaceful transfer of power

For almost four decades, Nancy Pelosi served the American people and worked to make our country better.

Of course, we did not accomplish everything we set out to do. No administration does. Some of the exhibits reflect unfinished business, in some cases, my own shortcomings and mistakes, in some cases because - as a sign I kept on the…