Dear Republican,Over the last few months, Laura and I have traveled the country and have been humbled by the enthusiastic support we have been given.Our country has faced many challenges in the last two and half years and we are meeting these challenges at home and abroad. We're defeating the enemies of freedom. And at the same time, we're confronting challenges to build prosperity for our nation and a more compassionate society.Every test has revealed the true character of America. And no one in the world can doubt the spirit and will and strength of the American people.We are...