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:

No, it is smart and safe. And, they should not be allowed to attend our flight schools either. Learn from our history!
Why can’t a business owner make his/her own decisions about choosing his/ her clientele?
Hey as I see it these things will kill you in a heart beAt. Because the person that said no to him because he was male. If a women he may have shot her.
The owner did the right thing.
Let’s do the math 110000 dead from guns in the last ten years in the USA 45 Americans killed from jihadis in the same period world wide you hate 1 and love the other hard to figure this out something has to change
wtf are you a damn nut
Your still not gonna be elected give it up
Rubio is a white Obama!
You’re right but right now they shouldn’t even be in this country
OK lets do the math. In 2015 over 38000 people were killed by cars. Are we going to blame the cars are the people. Are we going to do background checks on people buying cars, restrict people from buying more then one car, confiscate cars and make more laws so people will have difficult time to own one? Liberals and Democrats will find it difficult to understand this.