India, April 8 -- Concerns over Donald Trump's threats against Iran are beginning to emerge within Republican ranks, alongside Democrats calls for his removal. Trump's warning to destroy Iran if it failed to meet US demands drew criticism globally. But officials maintained the rhetoric was intended as a negotiating tactic.

In a social media post ahead of a deadline, Trump wrote, "A whole civilization will die tonight, never to be brought back again. I don't want that to happen, but it probably will." He later announced a two-week ceasefire.

Some Republicans publicly distanced themselves from the remarks. Senator Ron Johnson, a close Trump ally, said on the John Solomon Reports podcast that he hoped the comments were "bluster."

"I do no...