Tuesday's elections feature one of the most diverse group of candidates ever

One of the most diverse pools of candidates ever in the U.S. is up for election Tuesday, and many of them will be firsts if voted into office. They're running for offices for governor, House and Senate and state legislative, mayoral, city council and school board positions.

Of the thousands of such candidates that political scientists, activists and political action committees have tracked, most are running on Democratic tickets. That trend matches long-standing data that Republican voters and candidates are more likely to be white while the Democratic side