The conflict has left US credibility damaged and its president weaker at home, the Quincy Institute’s Trita Parsi has told RT   The war with Iran has been a strategic disaster for the US, leaving President Donald Trump in a weaker position at home and damaging American credibility, Quincy Institute co-founder Trita Parsi has told RT. He added that the conflict, which he said Israel had pushed for, had not unfolded as Washington expected. The war, which began with the US-Israeli bombing campaign on Iran on February 28 under the pretext of dismantling Tehran’s nuclear program, has dragged on far longer than Trump’s initial prediction of “two to three weeks.” The attacks have killed dozens of senior officials, including Iran’s longtime supreme leader, Ali Khamenei, as well as more than 1,300 civilians. Iran has responded by striking US bases in Gulf states, saying the strikes are an exercise of its right to self-defense.…