[Mr. Bird]

I give them another cycle or two before their power starts slipping away.

Highly unlikely. H. Ross Perot was the zenith of third (or "other") party viability. A dual party system can work, but there must be distinctions with a difference between the two. Personally, I still see the differences. Others do not. If they choose to vote for another party, that's their choice.

[DM1]

I am hoping to see a Green Party that has just enough force to keep bleeding the Dems but not to win any real elections
now that would be a fun party ;)

[Just another Joe]

A dual party system can work, but there must be distinctions with a difference between the two. Personally, I still see the differences.

I, too, can still see differences but they are becoming smaller and smaller as time goes on.