We really don't know. While some people mistakenly believe that Mark Harmon is related to actress Angie Harmon, a noted Republican activist, they are not related. Angie Harmon has been very vocal about her pro-Republican politics, but Mark has not said very much at all about his political views; and contrary to myth, not everyone in Hollywood is a Democrat, so perhaps he did support a Republican candidate. The point is, since he has not mentioned the candidates he supports, we can only speculate about whether he supported President Obama or Mitt Romney in the 2012 election.
No he does not
Barack Obama
The plumbers' union endorces Barack Obama for President.
Barack Obama
Barack Obama was the president of the United States.
President Barack Obama.
President Barack Obama, is wherever the U.S. needs him to be.
Barack Obama is the president of the United States of America.
Barack Obama. (The President is Barack Obama II.)
Yes Barack Obama can legally be president.
Donald J. Trump became the President after Barack Obama.
No, Barack Obama is the President of the United States of America.