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:

You so called congress are so dumb you all took an Oath to defend this country not to destroy it The Muslim have thier own training camps and don’t need our range what are you going when they rape your wife or daughter don’t call on the people that put in office they are not as Stupid as you think.
Go back to strippibg in your gay bar jerk.
Shut the$#%&!@*up! Rubio!
What an asshat
Go home you little$#%&!@* Your drunk!
This is excataly why we don’t need you in Washington. You support them here, let them near your wife and kids, than tell me what you think.
Why do you think he’s losing
It is immoral to have a museum come to a shooting range with so many guns being found out that in Greece thousands and thousands of weapons were found, with
Nobody is going to ban Muslim except Trump.. Better wake up
No it’s not they want to kill us you dumbass.