The wind-up has taken a while, but the full Senate might–just might–pitch into a major debate on postal issues next week. Earlier today, Senate Majority Leader Harry Reid, D-Nev., introduced a motion that would allow senators to take up the bill, known as the 21st Century Postal Service Act, as early as Monday. Although everything in the Senate (and we mean everything) is subject to change, Reid presumably wouldn’t have proceeded without some chance of having the votes to kick off debate. At the same time, it’s worth noting that Senate Minority Leader Mitch McConnell, R-Ky., isn’t commenting. Lawmakers could also have…