Lewis dropped two shots at the par-4 ninth but made eight birdies for a total of 9-under 133 after two rounds. Lang maintained her momentum at the top after carding a 4-under 67.
“I struggled last week and so it’s nice to just get out there and shoot some good scores,” Lewis said. “And seeing putts going in is always a good thing.
“The golf course is a little easier this year so you have to make birdies and just keep it in the fairways.”
Play was suspended for three hours during the day because of a heavy thunderstorm but all the golfers managed to finish their rounds.
Tseng holed six birdies, but she dropped shots at the fifth and ninth holes to finish with a 4-under 67.
“I feel really happy that I can go home and have a massage, instead of waiting here for a long time,” the five-time major winner said. “And that was a good birdie on 18 to give me 4 under today.”