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:

Thats,ok Rubio Obama is going to put them in military
Get out and vote for Trump!
No he isn’t
No. It is wrong and immoral to adhere to islam.
Idiot
That’s a highly offensive thing to say. You probably agreed with the Japanese internment camps too huh
Angel is dead on. It’s against the law to ban people from your public business based on religion
Rubio lost my vote.
This bastard can build a gun range and let them in.
If Gun Ranges are independently owned they can’t discriminate but it is a membership range then yes