Donald Trump leads Ted Cruz by 2 percentage points in a new poll from Iowa, suggesting a tightening presidential race ahead of the state’s Feb. 1 caucuses. Trump leads the GOP field, with 31 percent support, in Quinnipiac University's new poll, followed closely by Cruz's 29 percent. That slim lead is within the poll’s 4-point margin of error. ADVERTISEMENT Voters view Cruz more favorably than they view Trump, however, and more are open to the possibility of voting for him, according to the new findings. This is only the third poll of the last 11 in Iowa in which Trump...