In 2013, as he worked feverishly to pass the Gang of Eight comprehensive immigration reform bill, Sen. Marco Rubio, R-Fla., admitted to having one big worry. If it didn’t pass, Rubio — one of the bill’s primary authors — said he feared President Obama would simply use executive authority to give legal status to millions of currently illegal immigrants.

“Here’s my big worry,” Rubio told me during an interview while the bill was making its way through the Senate. “I fear that if this thing fails, the president will basically say to anyone in the U.S. who has been here more than three years, who has not committed a serious crime…he’ll say, ‘We’ll do for you what we did for the DREAM kids.’ And the problem with that will be you will have 10 million people legalized in the United States by executive order, so that when there is a new president, if it is a conservative, a Republican, one of the first decisions they will have to make is whether to yank that status from those people and deport them. I cannot imagine a scenario where a future president is going to take away the status they’re going to get. I believe it’s what [Obama] will do. Maybe not all 10 million, but he’ll do it for six million.”