Does this portend the end of DJT-mania?
Only if you are anxious to give the country away to fraudulently documented foreigners.
Trump got schlonged. By coming in second he loses all of that free air coverage. Now, it shifts to Rubio, and Rubio may soon pick up much more mainstream support. Trump will have to engage in more stunts and antics, maybe some additional twitter wars and weird accusations, to pick up free airtime. Cruz needs to keep his momentum going; he needs to do very well in New Hampshire.