Rick Santorum 2016 presidential campaign

The 2016 presidential campaign of Rick Santorum, former United States Senator from Pennsylvania, was formally announced at a rally in Pittsburgh on May 27, 2015. 
Background.
His campaign for the Republican nomination for President of the United States in 2016 is his second bid for the office, after having been a candidate in 2012, where he received the second most delegates after 2012 nominee Mitt Romney.