A consumer advocate backed by Sens. Elizabeth Warren (D-Mass.) and Kamala Harris (D-Calif.) will challenge a Republican congresswoman in next years election.

Katie Porter, an attorney who teaches consumer law at the University of California, Irvine and is the author of several studies on the subprime loan crisis, announced Monday she will run against Rep. Mimi Walters (R-Calif.) in 2018.

As a consumer advocate, Ive spent my career fighting Wall Street banks who cheat consumers and families, Porter said in a statement announcing her candidacy. Now, Im running for Congress to take that fight to Washington. Ill take on Donald Trump and the powerful Washington special interests who control Congress.

Walters represents a portion of Orange County, one of the GOPs strongholds in largely blue California. Democratic operatives have eyed the area as ripe for House seat pick-ups since the region sided with Hillary Clinton in the 2016 election the first time the county voted for a Democratic candidate since 1936 and are looking to attract voters who are displeased with President Donald Trump and lawmakers who back his legislative priorities.

Porters team has already employed that strategy, pointing to a FiveThirtyEight analysis showing Walters voting in line with Trumps agenda 100 percent of the time.