Jo Ann Nardelli, a Democratic party activist from Pennsylvania, has resigned from the PA Democratic party citing President Barack Obama's public support for gay marriage, reported.

Obama made his historic announcement earlier this month in an interview with ABC News' Robin Roberts.

“I respect all of you and all that I have achieved in the past,” Nardelli wrote in her resignation letter. “Due to personal matters and faith beliefs at this time, it is only fair to resign. I will miss you all very much as you are all a part of my family; however, it is time to move forward with my life in a direction that is more in line with my faith.”

Nardelli, a Catholic, announced her resignation at a press conference on Wednesday. According to Blair County GOP Chair A.C. Stickel, she cited the president's support for marriage equality.

She endorsed Mitt Romney's bid for the White House and changed her voter registration at the press conference.

Nardelli was an active Democrat for two decades and organized local events in support of the Obama campaign.