POLITICO Caucus shows Cruz gaining ground and Clinton pushing Sanders aside in the early voting states. After months of waiting for Donald Trump’s decline, Republican insiders now concede the poll leader could take two of the first four early voting states, though they caution his hold on Iowa is weak. That’s according to the POLITICO Caucus, our weekly poll of the top strategists, operatives and activists in Iowa, New Hampshire, South Carolina and Nevada. For this Thanksgiving holiday week, POLITICO analyzed seven months-worth of responses to our weekly benchmark question: Who would win your state if the voting were today?...