LAWRENCE, Mass. (AP)  – Sen. Elizabeth Warren has made her presidential candidacy official, kicking off her bid for the White House at a rally in the working-class town of Lawrence, Massachusetts. 

The Massachusetts Democrat joins a crowded field in her party’s primary. She hopes that her call to fight back against a “rigged system” will resonate as she battles at least five fellow senators for the nomination and chance to challenge President Donald Trump in 2020. 

Warren has spent the past decade in the national spotlight, first emerging as a consumer activist during the financial crisis. 

The Senator announced in late December that was forming an exploratory committee to run for president. 

Read More: Sen. Warren announces exploratory committee for 2020 presidential run