Rubio has been cruzing from fourth to seventh the last few months. When Trump and Carson falter, the true conservatives will go to Cruz. Everyone else will go to Rubio, who will take the nomination.
Can't see it. Rubio supports Amnesty. That's a non-starter for most of Trump and Carson's supporters.
Again- 62% of Republicans support one of the "whacky birds" - Cruz, Trump, Carson or Paul.
the "establishment" candidates combined, only rack up 27%.
Also, if Trump hasn't faltered up to this point, despite all the crazy shit he's done, I don't see that changing.