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:

He’s joking right ? I think they should stick to blowing themselves up ? Right ?
Really! let us teach them to kill us. Right!
Why is it wrong and immoral Marco? Do you know who and what they represent? They hate America and they want to take us over.
Those pricks have their very own ranges at their training camps here! Oh, and Rubero is a dillweed!
No! No!
NO IT IS NOT IMMORAL TO KEEP THEM OUT OF GUN RANGE,
LOL! Wrong? Immoral? Judge not lease yea be Judged!
Trump. Don’t have Rubio as Vp. He is pro muslims
Can’t use them as targets?
no its a safty measure