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Hillary Clinton’s shockingly large victory in South Carolina yesterday was driven almost entirely by African American voters. In fact, Clinton beat Bernie Sanders among black voters by an even larger margin than Barack Obama had eight years ago.

This guest piece is only available to Political Wire members. It’s written by Professor Leonard Steinhorn of American University’s School of Communication.

Let the political pundits and color commentators call the latest Republican presidential debate contentious, hostile, fiery and personal, as it truly was.

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Early last year, the concept of “lanes” to the Republican nomination took over as the preferred metaphor for the Republican presidential race.

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The Republican presidential candidates have one last chance to stop Donald Trump before he threatens to run the table on Super Tuesday.

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It’s a convenient narrative to suggest that both political parties are in turmoil this election year. But this is really all about the Republicans.

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Of the Republicans left in the presidential race, only Ted Cruz is competitive against Donald Trump in his home state.

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This piece is only available to Political Wire members.

Since Marco Rubio’s second place finish in South Carolina pushed Jeb Bush out of the race, he’s gained some significant endorsements from GOP establishment figures such as Sen. Dean Heller (R-NV), Sen. Thom Tillis (R-NC) and former Minnesota Gov. Tim Pawlenty. There’s even a rumored endorsement coming from Mitt Romney.

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With Jeb Bush out of the presidential race, Sen. Marco Rubio’s path to the GOP nomination got a little clearer. But he’s still very much an underdog to Donald Trump.

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For a guy who hasn’t won anything yet, Sen. Marco Rubio had a very good night. He likely finished in second place in South Carolina, but even if he slips into third it was still a very good night.

The main reason is that Jeb Bush dropped out of the race. Bush was obviously not persuaded by the argument that staying in the race could allow him to play a role in a contested convention. Instead, he got out of the race so he would not be responsible for allowing Donald Trump to win the nomination.

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There’s a lot of speculation that Jeb Bush will end his presidential campaign if he doesn’t do well in the South Carolina primary tonight.

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The New Hampshire primary didn’t winnow the Republican presidential field very much — only Chris Christie and Carly Fiorina left the race — but South Carolina might. It’s hard to overstate how important South Carolina is for so many of the candidates.