Violence

President Donald Trump speaks at a campaign rally, Thursday, Aug. 15, 2019, in Manchester, N.H. (AP Photo/Patrick Semansky)

Officers gather for crowd control near a massive police presence set up outside a house as they investigate a shooting in Philadelphia, Wednesday, Aug. 14, 2019. (AP Photo/Matt Rourke)

Occupy Central leader Benny Tai, center, talks to reporters outside the High court in Hong Kong Thursday, Aug.15, 2019. Tai, a top opposition leader imprisoned on public disorder charges was released on bail Thursday as Hong Kong's government attempts to quell a protest movement that has paralyzed parts of the territory, including its international airport, and led to hundreds of arrests. (AP Photo/Vincent Yu)

A screen displays words that read "It's Time For Senate Republicans To Finally Take Action To End Gun Violence" behind House Majority Leader Steny Hoyer of Md., right, and Rep. Eliot Engel, D-N.Y., left, as Hoyer speaks at a news conference calling for Senate action on H.R. 8 - Bipartisan Background Checks Act of 2019 on Capitol Hill in Washington, Tuesday, Aug. 13, 2019. (AP Photo/Andrew Harnik)

Policemen in riot gears arrest a protester during a demonstration at the Airport in Hong Kong, Tuesday, Aug. 13, 2019. Chaos has broken out at Hong Kong's airport as riot police moved into the terminal to confront protesters who shut down operations at the busy transport hub for two straight days. (AP Photo/Kin Cheung)

FILE - In this July 21, 2015 file photo San Jose Mayor Sam Liccardo, center, attends a conference on Modern Slavery and Climate Change at the Vatican. Liccardo, on Monday, Aug. 12, 2019, has proposed gun owners in the nation's 10th largest city to carry liability insurance to cover taxpayer costs associated with firearm violence. If approved, Liccardo's strict new measure would be the first of its kind in the nation to curb gun violence. (AP Photo/Gregorio Borgia,File)

Protesters use luggage trolleys to block the walkway to the departure gates during a demonstration at the Airport in Hong Kong, Tuesday, Aug. 13, 2019. Protesters severely crippled operations at Hong Kong's international airport for a second day Tuesday, forcing authorities to cancel all remaining flights out of the city after demonstrators took over the terminals as part of their push for democratic reforms.(AP Photo/Vincent Yu)

This undated booking photo provided by the Montgomery County Sheriff shows Ethan Kollie. Federal agents say Kollie, a longtime friend of Dayton, Ohio, gunman, Connor Betts, bought the body armor, a 100-round magazine and a gun accessory used in a mass shooting, but there’s no indication that the man knew that his friend was planning a massacre. The accusations came as prosecutors unsealed charges against Kollie that they said were unrelated to the Aug. 4 shooting. (Montgomery County Sheriff via AP) (Montgomery County Sheriff via AP)

Cleveland Indians' Yasiel Puig hits an RBI double off Minnesota Twins pitcher Jose Berrios in the first inning of a baseball game Sunday, Aug. 11, 2019, in Minneapolis. (AP Photo/Jim Mone)

Britain's Prime Minister Boris Johnson leaves the door to welcome King Abdullah II of Jordan at 10 Downing Street in London, Wednesday, Aug. 7, 2019. Johnson holds bilateral talks and a working lunch with the King of Jordan. (AP Photo/Frank Augstein)