Businessman Donald Trump has risen to the top of the polls for the Republican nomination in large part because of his focus and rhetoric on immigration. While he seems to be energizing a sizeable segment of the GOP base, Politico reports that many party leaders are concerned he could be paving the way for electoral disaster in November 2015:

Insiders to Trump: Enough already

Donald Trump may have the whole Republican field talking about immigration, but early-state insiders wish he would just …