U.S. Secretary of State Antony Blinken said Sunday that Israel has failed to reveal a “credible” plan to mitigate Palestinian deaths in Rafah, the Gazan city where more than a million civilians are sheltering from bombardment or running for their lives. He also said the bombings may have little real effect on eradicating Hamas. “Right now, the trajectory that Israel is on — even if it goes in and takes heavy action in Rafah — there will still be thousands of armed Hamas left,” he said on NBC’s “Meet the Press.” “The trajectory right now is that going into Rafah, even to deal with these remaini…