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:

Chris Bissman I refuse service to anyone I don’t like. You don’t like that, then suck a rock.
It was a moral to let you run to be a senator let alone present the United States you scumbag
Only A Moron Would Think This Was Good.
You mean like it wasn’t wrong for the 9/11 terrorists to take flying lessons in America to kill 3000 Americans! Are you kidding me! !!!! They should be on probation here. Sorry, their reputation precedes them. Some of remember 9/11!
Remember 9/11? Terrorists took flying lessons in America to kill 3000 Americans! How quickly some forget!
9/11, REMEMBER? Terrorists took flying lessons in America to kill 3000 Americans. You want them to take shooting lessons?
I agree! Some of us remember 9 / 11! They took flying lessons, then killed 3000 Americans!
9/11, terrorists took flying lessons and killed 3000 Americans!
Agree! Remember 9/ 11? Terrorists took flying lessons and killed 3000 Americans!
Yeah, but I remember 9/11. Terrorists took flying lessons and killed 3000 Americans!