Obama, GOP candidates offer campaign preview

Wednesday, January 25, 2012 | 5:24 p.m. CST; updated 6:03 p.m. CST, Wednesday, January 25, 2012

WEST PALM BEACH, Fla. — On a day that combined two campaigns into one, President Barack Obama on Wednesday challenged Republicans to raise taxes on the rich as Republicans Mitt Romney and Newt Gingrich swiped at him on the economy and criticized each other over immigration.