It is.the lack of honesty.
Remember, when he first ran for office there were all these threads here with his speeches (in Spanish) to La Raza and other groups promising amnesty posted on YouTube for all to see and here.
Then he would go give speeches to Florida Republicans promising to secure the border.
He had to be lying to one group or the other and when the gang of eight Bill came out it was clear which one he had lied to.
That he later joined with McCain and Graham in arming ISIS was perfectly in character.
That’s a good summary of Rubio. He was certainly trying to have it both ways. It’s good that people caught onto him in time. He could have done so much damage in higher office.