New York Sen. Kirsten Gillibrand’s political action committee has endorsed a primary challenger to an incumbent Democratic congressman.

Off the Sidelines PAC backed marketing consultant Marie Newman, who’s running against Rep. Daniel Lipinski in Illinois’ 3rd District.

One of the most conservative members of the House Democratic Caucus and a co-chairman of the Blue Dog Coalition, Lipinski opposes abortion rights. He is one of only three Democrats remaining in the House who voted against the 2010 health care law, but he has not supported GOP efforts to repeal the law.

“We need Marie Newman in Congress so that we have another vote for health care, for women, and for our LGBTQ friends and family,” Gillibrand said in a statement.

Newman is backed by Daily Kos, the liberal website. She ended the third quarter with $98,000. She’s loaned her campaign $50,000. Lipinksi had $1.5 million in the bank.