[LachlanMinnesota]

What I don’t understand is how the Democrats really could care at all about him, since they had the majority anyway, and Spector was a sure vote either way.

So why give Spector any deal at all?

They didn’t have to buy the cow to get the milk for free.

[philman_36]

So why give Spector any deal at all?
If you read the transcript I posted above you'll read that there was no deal.
Page 3...
MR. GREGORY: I want to move on, though, to the question of what it took for the Democrats to get you. What were you offered? What inducements have you been given to switch parties?
SEN. SPECTER: None.
MR. GREGORY: None.
SEN. SPECTER: None.