He hasn't weakened the United States. In many ways he has strengthened it. The economy is doing well. Some poor people are getting health insurance for the first time in their lives. With his endorsement, DOMA was struck down and LGBT people are getting new rights Federally, and has opened doors for law suits that will let more and more people have the same rights as everyone else.
President Obama has strengthened the United States. We have more friends
abroad now. Our economy is recovering. Soon we will have a more equitable
health care system, like the ones shared by industrialized countries around the
world. We still have far to go, but our country will be stronger because it is
becoming healthier, more prosperous and more well liked around the world.