Arizona teachers and education advocates march at the Arizona Capitol protesting low teacher pay and school funding in Phoenix. Ross D. Franklin/AP hide caption

Kansas Secretary of State Kris Kobach is a Republican who had led President Trump's now-disbanded commission on voter fraud. John Hanna/AP hide caption

The engine on a Southwest Airlines plane is inspected as it sits on the runway at the Philadelphia International Airport after making an emergency landing there on Tuesday. Amanda Bourman/AP hide caption

Cardboard cutouts of Facebook founder and CEO Mark Zuckerberg stand outside the U.S. Capitol in Washington as he testified before a Senate panel last week. Kevin Wolf/AP hide caption

Attorney General Jeff Sessions has ordered federal prosecutors to consider tougher charges against people who illegally cross the U.S.-Mexico border for the first time. Susan Walsh/AP hide caption

Soybeans ready for shipment and planting at a Kansas farm are one of the products at the center of the trade dispute with China. Orlin Wagner/AP hide caption

U.S. Border Patrol agents patrol the border fence in Naco, Ariz. President Trump wants to send National Guard contingents to assist them. Ross D. Franklin/AP hide caption

Law enforcement stands watch outside of the YouTube headquarters on Tuesday in San Bruno, Calif. Police are investigating an active shooter incident at YouTube headquarters that has left at least one person dead and several wounded. Justin Sullivan/Getty Images hide caption

Zachary Cruz, in an earlier court appearance during the arraignment of his younger brother, Nikolas Cruz. AP hide caption

Protesters stand outside of council chambers during a special city council meeting at Sacramento City Hall on Tuesday in Sacramento, Calif. Hundreds packed a special city council at Sacramento City Hall to address concerns over the shooting death of Stephon Clark by Sacramento police. Justin Sullivan/Getty Images hide caption

The Orange County Board of Supervisors during a meeting in Santa Ana, Calif., on Tuesday. The board voted to oppose California's sanctuary law for undocumented immigrants. Amy Taxin/AP hide caption

Newly naturalized U.S citizens complete voter registration forms in Bethel Park, Pa., in November 2017. The 2020 census will ask respondents whether they are citizens. Keith Srakocic/AP hide caption

"Equality flags" are on display during a Capitol Hill event in Washington, D.C., supporting of transgender members of the military. Jacquelyn Martin/AP hide caption