Sen. Rand Paul -- who barely limped into the debate -- may have began his come-back tonight. About halfway through the debate, he used his time to make a pointed attack on Donald Trump and his supporters.

Is Donald Trump a serious candidate?... If you're going to close the Internet, realize America what that entails. That entails getting rid of the First Amendment... So, when you ask yourself, whoever you are that are supporting Donald Trump, think: Do you believe in the Constitution? Do you want to change the Constitution?

Paul, responding to Trump's comments saying he would close parts of the Internet, said:Paul also attacked Trump in his opening statement -- using both opportunities to appeal to libertarian-leaning (mostly younger) Republicans. Will the strategy work?

Here's the video: