The nature of primary elections is that they're a waypoint along the path to the real contests for elected office in the general election, though on Tuesday, some of the results brought closure for seasoned lawmakers and a new trajectory for others. The two big winners for Democrats - Justin Chenette for a Saco-area Maine Senate seat and Ben Chipman for one of the Portland Senate seats - represent an up-and-coming young gun on one hand and a victory for someone who wasn't even a Democrat until nine months ago on the other.