There’s still a long time until Election Day, but Democrats have a big gap to make up if they hope to catch up with the campaign finances available to U.S. Rep. Bruce Poliquin, the two-term Republican from Maine’s 2nd District. The half dozen hopefuls on the Democratic side have taken in more than $300,000 so far — enough to give them a boost but still well behind the $1.5 million that Poliquin has stashed in his campaign treasury. Leading the pack is State Rep.