The field for the 2016 U.S. presidential election continues to grow with three prominent Republicans entering the race this week.
Ben Carson said in an interview Sunday he will run in the already crowded competition for his party's nomination. He planned a formal announcement at an event Monday in Detroit.
Carson rose to prominence two years ago with a speech criticizing President Barack Obama's landmark health care initiative, but has also drawn criticism for equating that program to slavery and for comments about homosexuality.
Also Monday, former Hewlett-Packard CEO Carly Fiorina was due to announce her candidacy. She has some experience in national politics having served as an economic advisor to Senator John McCain during the 2008 presidential race he lost to Mr. Obama, as well as her own failed 2010 bid for a U.S. Senate seat.
Another candidate from 2008, former Arkansas Governor Mike Huckabee, plans to join the race on Tuesday.