John McCain, the presumptive Republican presidential candidate, got a Valentine’s Day gift Thursday from his former rival, Mitt Romney, who is agreeing to throw his support to the Arizona senator. McCain has been the expected GOP candidate since Romney dropped out, though former Arkansas Gov. Romney won about 280 delegates who will now be urged to back McCain, who began the day with 843 delegates. The Romney delegates would be enough to put McCain past the 1,191 delegates needed for the GOP nomination. McCain has been working in recent days to mend fences with conservatives who have considered him too liberal, in part for his support of immigration reform. Barack Obama, her principal opponent for the Democratic presidential nomination, announced a key endorsement in Rhode Island. Read More