Marco Rubio spoke at CPAC this morning.

Based on the video, it looked like a full house and enthusiastic crowd. The Washington Times reports:

Sen. Marco Rubio of Florida on Saturday told the conservative grassroots that the country’s young people won’t have a chance if Democrats keep control of the White House — or if the conservative movement is “hijacked” by someone who’s not a conservative.

“Being a conservative can never be about simply an attitude. Being a conservative cannot simply be about how long you’re willing to scream, how angry you’re willing to be, or how many names you’re willing to call people,” Mr. Rubio said at the 2016 Conservative Political Action Conference (CPAC), to sustained applause.

“I think there’s a growing amount of confusion about what conservatism is,” he said. “And it is time for us to understand that conservatism is not built on personalities. Conservatism is not simply built on how angry you might seem from time to time.”

During the QA, Rubio repeatedly hit out at Trump in response to questions, continuing the combatative style evident in the past two debates. Here is the mark in the video when he most directly went after Trump: “Ronald Reagan looked and acted nothing like Donald Trump.”

The Washington Times further reports:

During a question-and-answer session after his address, Mr. Rubio said he waited so long to go after GOP front-runner Donald Trump because he was fighting off other attacks and that he didn’t get into the race to beat up on other candidates.

“If you had told me a year ago that the front-runner at this stage in the Republican campaign would be a supporter of Planned Parenthood, who says he doesn’t stand with Israel, who has a long record of supporting government-sponsored health care, I would say, on what planet would that be the Republican front-runner?” he said. “But it’s happened. And I think we have to ask ourselves why we allowed that to happen.”

Whether these attacks on Trump make any difference will depend not on whether it convinces Trump supporters, but whether it stems the flow of non-aligned voters to Trump and takes enough support from Cruz and Kasich to allow Rubio to win Florida.