Rubio isn't a monster on the invasion of the US, that tag belongs to Jeb and Kasich. Rubio wants a solution and is coming around to realize that nothing changes until the border is secure and people trust the gov to keep out illegals.
At least he's finally coming around, like the Titanic came slowly around, but I think it's only because people, the voters, are hammering it into the space between his eyes.
Rubio is still an e-GOP "operative" in his primary orientation. Our problem is that the e-GOP has got markers out everywhere, and they are determined to cash them for open borders and wage-breaking green-card immigration and offshoring tax breaks.