Government regulations

FILE- In this Jan. 2, 2018, file photo, a trader talks on his phone before the start of trading at the New York Stock Exchange. The U.S. stock market opens at 9:30 a.m. EDT on Monday, June 18. (AP Photo/Mark Lennihan, File)

FILE - In this Thursday, March 15, 2018 file photo, Rupert Stadler, CEO of German car producer Audi, briefs the media during the annual press conference in Ingolstadt, Germany. German authorities have detained the chief executive of Volkswagen's Audi division, Rupert Stadler, as part of a probe into manipulation of emissions controls. (AP Photo/Matthias Schrader)

Tourists visit the Motherland Calls monument as the portrait of Soviet founder Vladimir Lenin is seen on the wall in front during the 2018 soccer World Cup in Volgograd, Russia, Sunday, June 17, 2018. The monument commemorates the victims of the Battle of Stalingrad, in which the Red Army turned back Nazi Germany's army in Volgograd. (AP Photo/Thanassis Stavrakis)

In this June 12, 2018, photo, President Donald Trump meets with North Korean leader Kim Jong Un on Sentosa Island in Singapore. Trump credits his accord with North Korea’s Kim Jong Un with saving tens of millions from nuclear war. Now he just has to get everyone else on board. Frustrated with lukewarm backing from congressional Republicans, criticism from Democratic opponents, and skepticism from allies and the media, President Donald Trump made an extraordinary stop on the North Lawn of the White House Friday to promote the nuclear deal that critics have decried as a vague and lacking in clear objectives. (AP Photo/Evan Vucci)

FILE - In this March 22, 2018, file photo, White House Director of Legislative Affairs and Assistant Marc Short speaks in the Brady press briefing room at the White House in Washington. Short has told staff that he'll be leaving the position this summer. Two White House officials said Short disclosed his plans on June 15. (AP Photo/Manuel Balce Ceneta, File)

FILE - In this March 22, 2015 file photo, Jared Taylor speaks during the International Russian Conservative Forum in St.Petersburg, Russia. A California judge has refused to throw out a lawsuit that accuses Twitter of violating the free speech rights of a leading white nationalist figure by banning his social media account. California Superior Court Judge Harold Khan ruled in Taylor's favor during a hearing Thursday, June 14, 2018 on Twitter's request to dismiss the suit, court records show. Taylor claims Twitter permanently suspended accounts belonging to him and hundreds of other far-right users in December based solely on their political views and affiliations. (AP Photo/Dmitry Lovetsky)