Former President Donald Trump beat his closest two opponents in Iowa by 30 points on Monday, a commanding showing from the GOP front-runner as the contest heads to New Hampshire next week. But Republicans hoping for an alternative to the twice-impeached Trump say they still see a window, narrow as it might be, for former South Carolina Gov. Nikki Haley or Florida Gov. Ron DeSantis. “I think she does need to do very well in New Hampshire, I’ll be the first to acknowledge that,” former Sen. Pat Toomey, who backs Haley, said this week. “She has put a lot of time and effort in there … it’s well-…