On Facebook, at least, Sen. Marco Rubio, R-Fla., is the least talked about on sitting senator running for president.  

In the last month leading up to Thursday night’s Fox Business debate, 1.49 million people in the United States posted about, shared, like or commented on content about Rubio over 4.5 million times, according to data released by the social media platform. Compare that with Donald Trump, who is leading candidates in Facebook engagement — 18.9 million people have posted about, shared, liked or comments on content about the business mogul more than 105 million times in the last month.  

Hillary Clinton comes in second place; she had more than 10.7 million people talking about her 59.9 million times. She is followed by Sen. Bernard Sanders, I-Vt., who had more than 6.6 million people talking about him about 35 million times.  

The next most popular Republican candidate on Facebook is Sen. Ted Cruz, R-Texas, who 4 million people posted about, shared, liked or commented on content approximately 18.5 million times.  

Trailing behind Ben Carson, Sen. Rand Paul, R-Ky., who didn’t make it into this debate, had more Facebook engagement than former Florida Gov. Jeb Bush and Rubio. The Kentucky senator had more than 1.7 million people talking about him more than 6.2 million times.  

Rubio ranks above Carly Fiorina, Mike Huckabee, New Jersey Gov. Chris Christie, Ohio Gov. John Kasich, former Sen. Rick Santorum, R-Pa., former Maryland Gov. Martin O’Malley and former Virginia Gov. Jim Gilmore, who comes in last.

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