Super Tuesday, the busiest day of the presidential primary season, took place last week. Ten states voted. Mitt Romney won six of them, Rick Santorum won three and Newt Gingrich’s only Super Tuesday win was Georgia.

Romney more than doubled his delegate count on Tuesday, bringing his total up to 415. Santorum has 178 delegates, Gingrich has 107 and Ron Paul has 46. A total of 1,114 delegates are needed to clinch the nomination, and 1,541 remain up for grabs in the upcoming primaries, so it is still too early to count anyone out. A New York Times graphic with detailed primary results can be found here.

The contest was closest in Ohio, where Romney beat Santorum by less than one percent of the vote.

Super Tuesday tests the candidates’ ability to run campaigns in multiple states simultaneously, which is good practice for the general election in November.

In most election years a clear frontrunner is declared after Super Tuesday, but the Republican Party’s unwillingness to unite behind a candidate will result in a longer, more expensive campaign process that will force candidates to use resources to combat each other rather than the party’s opponent in the general election, President Barack Obama.

It also means that states voting later in the process will have more influence in the election results than usual, including North Carolina, which holds its primary May 8.