There has been much talk about Super Tuesday and its importance in deciding presidential nominees, but what exactly is it?

Super Tuesday is a day in which the greatest number of states hold primary elections. For nearly 30 years, every candidate who has won the majority of states on Super Tuesday has gone on to become their party’s presidential nominee.

This year, Super Tuesday was on March 1. Eleven states participated as well as the American Samoa territory.

Last night’s focus was on Donald Trump. On Sunday, Trump failed to repudiate his endorsement by David Duke, former Grand Wizard of the Klu Klux Klan during a CNN interview. Such incidents have caused GOP leaders, such as Republican political consultant and policy advisor Karl Rove, to disavow Trump.

According to The New York Times, Rove addressed a luncheon of Republican governors warning that “Trump’s increasingly likely nomination would be catastrophic, dooming the party in November.”

Last night Trump won seven states. He took Alabama, Arkansas, Georgia, Massachusetts, Tennessee, Vermont and Virginia. However, he suffered a big loss in Texas, Oklahoma and Alaska to Ted Cruz.  Marco Rubio won his first state, Minnesota.

On the Democratic side, Hillary Clinton won seven states. She took Alabama, Arkansas, Georgia, Massachusetts, Tennessee, Texas and Virginia. Her opponent Bernie Sanders won the remaining four.

While it is still early in the campaign process, unless things change soon, predictions expect a Clinton versus Trump race for the presidency.