Reply #7: it's hard

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. . . for candidates and nominees to express fealty to positions which haven't yet garnered enough support in their state or region to advance them into office. If Perriello does advance, he'd be loath to disregard where the bulk of that support came from. Our (your) challenge is to continue to build support for the positions you believe he's neglected or opposed.

In all of that, it makes perfect sense to support a Periello candidacy at this point, because of the challenges our party faces in organizing a working majority from which to launch and advance whatever initiatives we intend to survive this election cycle.