What's your theory? That she gets momentum after doing surprisingly well in Iowa?
There's certainly a theory that an under-70 moderate might do well against Trump, but I read an interesting piece the other day saying that the current political environment is driven by a structure that tends to favor candidates near the poles (not polls):
If I were looking for a longshot, I might try the Republican side (Pence or Haley?) on the theory the market has failed to bake in the health risks to someone Trump's age.