By Julia Symmes Cobb BOGOTA (Reuters) – Colombia’s President Juan Manuel Santos is running for a second term in a May 25 election, with polls showing he will probably win but go to a second round of voting. Here are the main candidates and their policies: JUAN MANUEL SANTOS The president opened peace talks with Marxist FARC rebels and his legacy may hinge on the outcome of the negotiations. Santos has promised to implement judicial reforms and to strike back at criminal gangs during his second term, as well as break down barriers to housing and education. Born into one of Colombia’s most powerful families, Santos, 62, is a consummate political insider.