Trump is hanging over every aspect of the Democratic presidential contest

Mt. Vernon, Iowa (CNN)He may not be on the Democratic ballot, but the 2020 presidential candidate wielding the most influence over the party’s remarkably unsettled primary fight is President Donald Trump. In conversations with two dozen voters across Iowa this week, the President’s name came up again and again as Democrats weigh their choices and search for the candidate they believe is the most electable. It was always Trump’s intention to play a central role in the Democratic primary. And now, he is. Even among unabashedly proud liberals, Trump is shaping decisions. What voters are saying “I identify as a Democratic socialist. Progressive politics speak to me and that’s what I prefer, but I also understand that I am not …