Three players were tied for second, the most compelling of whom was 17-year-old amateur Hye-Jin Choi of South Korea, the low amateur in last year's Women's Open.
In addition to a hard course and the wet conditions, Henderson was faced with another distraction when president Donald Trump arrived in a private box on the 15th hole as her group rolled through. Third-ranked Lexi Thompson was at 71, along with Stacy Lewis.
One adjective that is has not been used to describe it (yet) is: political.
"They are sending the exact wrong message to the women golfers and to their fans and to the rest of the country about what they stand for by hosting a tournament at a course named after a racist, sexist, serial sexual abuser", said Co-Founder of Ultraviolet, Shaunna Thomas.
Henderson was the only Canadian to survive the cut after two rounds.
"I started the round a little slow", Yang said. "I was so happy to be able to tee it up today".
There were calls for the United States Golf Association to move the tournament to a different location, but that did not happen. So I don't take that as an excuse if I don't play well this week.
"Obviously it's incredible because it's here in New Jersey but to contend in a U.S. Open, regardless of where the location is, is unbelievable", Alex said. When Bill Clinton came to the 1997 U.S. Open at Congressional, the USGA built a special bulletproof tower for him to watch the action on Father's Day with Chelsea.
Shanshan Feng holds a narrow advantage after a weather-disrupted opening day at the US Women's Open.
Bryson DeChambeau was second after a 65. Feng enjoyed the pairing of the three Olympic medal winners. Moore missed the previous five weeks with a left shoulder injury.
Ko made another bogey on the 11th before she nailed four birdies in the back nine of the course.
World number one Ryu So-Yeon carded an even par 72 to join four players sharing sixth on 140 that also included South Korean Chun In-Gee, Japan's Haru Nomura and Spain's Carlota Ciganda.
Pavin was the clubhouse leader after shooting a 68.
A fierce early afternoon thunderstorm caused a delay of play for 2 hours, 24 minutes.
For sure, the rust that had accumulated since she was last able to go full out was on display, as Wie scuffled to a 3-over 39 in her outgoing-9.
Wie dropped in a crying emoji and concluded with another that winked and blew kisses after writing: "I am confident with continued treatment, I will be at 100% by the Scottish and British Open". He was 10 shots off the lead after two days that exposed the current frailties in his wedge play and putting at Irvine, Scotland.
Shanshan Feng has a one-stroke lead midway through the second round of the 72nd U.S. Women's Open Championship. I just couldn't swing. "Waiting for something, some sort of spark".
At a visit last month, for instance, Trump surprised a couple celebrating their wedding at the club and posed for pictures with them.