So here's my question... how can you change parties while you are serving a term? I don't care if we're talking about President or dog catcher... the person ran on a particular ticket as a member of a particular party, got their support FROM that party and made promises TO that party. Seems to me if Mr. Spector... or ANYBODY... wants to change parties, he shouldn't be able to do it while in office.
And second, how trustworthy could this guy be? He flat out said he was changing because he couldn't get reelected by the same party the next time around. He didn't say he fould himself in overall agreement with the Dems or even that he had serious issues with the Reps EXCEPT the Rep voters in his state would not reelect him again.
you are missing several points. and have a few good ones. anyone can change party affiliation at any time. it may be frowned on, and it may well be deemed less than ethical, but on the same hand, it can easily be read as an act of conscience, by those so inclined
it is not at all true that he couldn't WIN an election as a republican, but that he couldn't get NOMINATED as a republican see joe liebowitz, who chose a different tactic to remain a senator.
as much as i have disagreed with spector over some issues, he has, in the main voted his conscience. he is, however, every bit as beholden as most in the US legislature, and as such, isn't really all that ethically untainted.
as a long time politician, he has chips he can cash, and he will lend cover to blue dog democrats to vote either with or against party leadership.
and, as we discovered when jeffords defected from the gop to independent, committee leadership and legislature leadership is determined by pure headcount. not as critical when there is a big lead, but big with split congress and when approaching magic filibuster proof actions.
others can add additional rationales.