President Trump announced earlier this month that Kevin McAleenan was leaving the post. Trump is now set to turn to Wolf to lead the agency, according to sources briefed on the decision.
Sen. Elizabeth Warren released her plan to pay for single-payer health care without imposing new taxes on the middle class. She's looking to employers and billionaires, in addition to other sources.
The impeachment inquiry entered an open phase as the House voted to formalize the probe this week. Committees heard from key witnesses about the president conditioning military aid on investigations.
Democratic presidential hopefuls are in Iowa for the Liberty and Justice celebration, a storied event where candidates show off their organization. It helped launch Barack Obama's 2008 victory.
President Trump is set to pick his fifth head of the troubled Department of Homeland Security. Chad Wolf is currently serving in a lower level job at the agency.
NPR's Ailsa Chang speaks with E.J. Dionne of The Washington Post, and Hugo Gurdon of the Washington Examiner, about the House vote to endorse the impeachment inquiry into President Trump.