After six months of mulling over November’s election results, many Republicans remain convinced that the party’s only path to future victory is to improve the GOP’s appeal to Hispanic voters. But how many Hispanic voters do Republicans need to attract before the party can again win the White House?

A lot. Start with the 2012 exit polls. The New York Times’ Nate Silver has created an interactive tool in which one can look at the presidential election results and calculate what would have happened if the racial and ethnic mix of voters had been different. The tool also allows one to project future results based on any number of scenarios in which the country’s demographic profile and voting patterns change.