Editor's Note: This story has been updated with the entry of Mike Martinez into the race.
After months of speculation, two Democratic candidates have emerged to campaign for the contested Senate District 10 seat that Sen. Wendy Davis has vacated to run for governor.
Fort Worth community leader Libby Willis and businessman Mike Martinez officially entered the race on Saturday. They will compete to keep the seat under Democratic control in a swing district that tends to lean Republican. Four Republicans have already entered the race and have been campaigning for months.
Willis, the daughter-in-law of former state lawmaker ...