It was primary day in Oklahoma on Tuesday, and women won on both sides.

The victories of Rep. Mary Fallin (R) and Lt. Gov. Jari Askins (D) in yesterday's Oklahoma gubernatorial primaries makes the Sooner State the latest state on track to elect a female governor this fall. Along with Oklahoma, New Mexico is ensured to elect a female governor too -- Doña Ana County District Attorney Susana Martinez (R) is facing off against Lt. Gov. Diane Denish (D).

Women have also been nominated in gubernatorial races in four other states: state Rep. Nikki Haley (R) in South Carolina, former eBay CEO Meg Whitman (R) in California, state Chief Financial Officer Alex Sink (D) in Florida and state Senate President Libby Mitchell (D) in Maine.

Arizona Gov. Jan Brewer's (R) primary opposition has all but disappeared, while state House Speaker Margaret Anderson Kelliher (D), state Auditor Rita Meyer (R) and former Secretary of State Karen Handel (R) are competing for their parties' nominations in Minnesota, Wyoming and Georgia, respectively.

Women are also competing in a number of other less competitive gubernatorial races around the country.