(Andrew Harnik | The Associated Press) In this Nov. 29, 2018, file photo, Sen. Elizabeth Warren, D-Mass., answers questions at the American University Washington College of Law in Washington, after delivering a speech on her foreign policy vision for the country. Sen. Elizabeth Warren is taking the first major step toward running for president. The Massachusetts Democrat said Monday she’s launching an exploratory committee for the 2020 campaign. She’s the most prominent Democrat yet to make such a move. Warren is one of the most recognizable figures in the Democratic Party and a favorite target of President Donald Trump.