Donald Trump - who has been acting like he was going to run for President in 2012, and who stated his opposition to SSM frequently - has decided not to run:

Donald Trump said today he will not seek the Republican nomination for president, after stoking speculation with statements and speeches taking on pro-abortion President Barack Obama.

After months of speculation about his future plans, Trump released a statement today saying, “After considerable deliberation and reflection, I have decided not to pursue the office of the Presidency.” --LifeNews