German Chancellor Angela Merkel arrives to attend a UN Migration Conference in Marrakech, Morocco, Monday, Dec.10, 2018. Top U.N. officials and government leaders from about 150 countries are uniting around an agreement on migration, while finding themselves on the defensive about the non-binding deal amid criticism and a walkout from the United States and some other countries. (AP Photo/Mosa'ab Elshamy)

In this Dec. 7, 2018 photo, President Donald Trump speaks the 2018 Project Safe Neighborhoods National Conference in Kansas City, Mo. Trump’s growing legal peril has unnerved Republicans who believe the turmoil has left the president increasingly vulnerable as he gears up for what is sure to be a nasty fight for re-election. (AP Photo/Andrew Harnik)

The lit up words "Peoples Vote", which calls for another referendum on Britain's European Union membership, are photographed by a remain, anti-Brexit supporter wearing a European flag design beret across the street from the Houses of Parliament in London, Monday, Dec. 10, 2018. British Prime Minister Theresa May has postponed Parliament's vote on her European Union divorce deal to avoid a shattering defeat — a decision that throws her Brexit plans into chaos. (AP Photo/Matt Dunham)

A man holds his hands in the air in front of a line of Border Patrol agents during a protest Monday, Dec. 10, 2018, in San Diego. U.S. officials arrested 32 people at a demonstration Monday that was organized by a Quaker group on the border with Mexico, authorities said. Demonstrators were calling for an end to detaining and deporting immigrants and showing support for migrants in a caravan of Central American asylum seekers. (AP Photo/Gregory Bull)

French President Emmanuel Macron, center, French Prime Minister Edouard Philipppe, left, and Environment Minister Francois de Rugy, second right, and Labor Minister Muriel Penicaud meet with representatives of trade unions, employers' organizations and local elected officials at the Elysee Palace in Paris, Monday, Dec.10 2018. Macron is preparing to speak to the nation Monday at last, after increasingly violent and radicalized protests against his leadership and a long silence that aggravated the anger. (Yoan Valat, Pool via AP)

FILE - In a Monday, Dec. 3, 2018 file photo, Nick Ayers, right, listens as Supreme Court Associate Justice Neil Gorsuch waits for the arrival of the casket for former President George H.W. Bush to lie in State at the Capitol on Capitol Hill in Washington. President Donald Trump's top pick to replace John Kelly as chief of staff, Nick Ayers, is no longer expected to fill that role, according to a White House official. The official says that Trump and Ayers could not agree on Ayers' length of service. (Jabin Botsford/The Washington Post via AP, Pool, File)

FILE - In this Oct. 19, 2018, file photo, Democratic challenger Tony Evers, left, and Wisconsin Gov. Scott Walker, a Republican, shake hands during gubernatorial debate in Madison, Wis. Republicans pushing to hang on to power in Wisconsin and Michigan aren't stopping at curbing the authority of incoming Democratic governors. They're also trying to hamstring Democrats who are about to take over as attorneys general. (Steve Apps/Wisconsin State Journal via AP, File)

FILE - In this April 21, 2013 file photo, Maria Butina, leader of a pro-gun organization in Russia, speaks to a crowd during a rally in support of legalizing the possession of handguns in Moscow, Russia. Prosecutors say they have “resolved” a case against Butina accused of being a secret agent for the Russian government, a sign that she likely has taken a plea deal. The information was included in a court filing Monday. (AP Photo/File)