Is it Possible for Senator Marco Rubio to Overtake Donald Trump and win the GOP Presidential Nominee?

Highly unlikely. Senator Rubio will most probably pick up a few voters who would have otherwise voted for establishment candidates such as Bush or some of the others prior to their dropping out of the race. However, as for the people voting for Trump or Cruz, I don't think they're going to change their mind at this point for someone who was a key proponent of the 2013 immigration bill. And if Ted Cruz drops out at this point, most of his voters will likely drift towards Trump strengthening him even further. It's also important to note that there's been a media hype surrounding Rubio, simply because many figures in the media would much prefer it if Rubio won at this stage in the game. It's artificial, and it won't last.

Not a chance in hell.

When i think of Rubio I flash back to Christie brutalizing him in the debate and Rubio just wilting, sweating and repeating himself. I was thinking if he can't handle that, how can he handle the pressure of being President?

Like others said though, it depends who else drops out.

Personally, I wish Kasich would start gaining some momentum.