I just thought you should answer first, since you were asked first. One of Jimbasil's favorite tactics is to keep asking questions when he doesn't want to answer, and then he accuses the other person of not wanting to answer. Thought you might be borrowing a tactic.
I'm curious why this is important. I suppose your position is that someone who hasn't voted for the other party in X years can't be non-partisan when analyzing a constitutional amendment proposal? I don't think that is a legitimate position. There are people on this forum with very strong views on both sides of the political divide, who can nonetheless set aside partisanship on important issues.
As for me and my bipartisan credentials, such as they are: I have donated money to only one party, the Libertarian Party. I have donated money to just three candidates for national office, a Democrat, a Republican and an Libertarian...and I donated far more to the Libertarian than I donated to the Democrat and Republican combined. I regularly vote Democrat on criminal law issues/offices (prosecutors/judges) and Republican on fiscal spending positions (legislature/congressional positions). For US senate or POTUS, I have only voted Republican or Libertarian. As a pro-life libertarian, I find it hard to vote for big government pro-abortion candidates, and that is what the Democrats usually offer.
How about you? Any R's on your ballots or donations?