Marco Rubio continually loses his way and forgets that the main stream of American society is feeling alienated and disenfranchised. And it seems that Rubio can be bought and will change, chameleon-like, depending on who he is talking to and what he hopes to benefit from them.
Of course, the biggest mistake he made is with the Gang of Eight and the amnesty program. He made common cause with Democrats who want lots of new Latino voters who will be Democrats for life if they are given amnesty. He did this to unite with big business, which means donors, who want cheap labor. He ignored the fact that millions of illegal immigrants are flooding the country, taking jobs that Americans will do, taking lots of government services, and disrupting societies and standards. There is no attempt to assimilate, only to impose. Rubio later tried to explain after it cost him his credibility, but he was caught lying. His believability has sunk to new lows, and now he has decided to throw in with another group that is not interested in assimilating. He is simply digging a bigger and bigger hole.
Rubio against U.S. citizens again, page 2:

When I’m at a gun range, I don’t to worry about being shot by a terrorist in the back.
He’s a moron
Who is Doug Palmer
Stupid !!!!!
No it’s not!
Hey Rubio$#%&!@*YOU$#%&!@*!!!!
FO dip$#%&!@*..
Let me say, I am not a racist. However if we would have banned Muslims from flight training, the towers would not have been attacked. So what is the answer, since US LIVES seem to matter less to you than the rights of potential terroists?!
Rubio is a spoiled,$#%&!@*sucking little$#%&!@* He represents THE REASON this country is spiraling downward. Career politicians that arent qualified to do anything other than run there mouths!
Until they shoot your$#%&!@* How do you know if they are jihadist or not?until this thing is sorted out they should not even have weapons. How many Americans (including Muslims) must for before we take steps to protect ourselves. All these multiple murders have been done by Muslims.