Actually, no. I'd say the portion after your "and" is the main clause, and the humongus one leading up to it is only subordinate.
As Maine goes, so goes the country. This is an old political addage about GG's state, meaning that whoever Maine votes for will win the election. I know it's strange. Neither clause really seems independent. They depend on each other. (Perhaps it's another example of one CJ just posted as "interlocking clauses.")
- A.