Campaign advertising

President Donald Trump speaks to members of the media before boarding Marine One helicopter on the South Lawn of the White House in Washington, for the short flight to nearby Andrews Air Force Base, Md., Friday, July 19, 2019. (AP Photo/Pablo Martinez Monsivais)

This undated product image obtained by the Associated Press shows Nike Air Max 1 Quick Strike Fourth of July shoes that have a U.S. flag with 13 white stars in a circle on it, known as the Betsy Ross flag, on them. Nike is pulling the flag-themed tennis shoe after former NFL quarterback Colin Kaepernick complained to the shoemaker, according to the Wall Street Journal. (Nike via AP Photo)

President Donald Trump walks through the Colonnade of the White House, next to Polish President Andrzej Duda, as they arrive for a news conference in the Rose Garden, Wednesday June 12, 2019, in Washington. (AP Photo/Jacquelyn Martin)

In this Saturday, June 1, 2019 photo, a passing bicyclist pauses to watch supporters of Denver Mayor Michael Hancock as they pause for a picture during a rally for the incumbent in Denver. Hancock, who is seeking his third, four-year term as mayor, is facing Jamie Giellis in a runoff Tuesday. (AP Photo/James Anderson)

FILE - This Thursday, Jan. 3, 2013, file photo shows Google's headquarters in Mountain View, Calif. The U.S. Justice Department is readying an investigation of Google’s business practices and whether they violate competition standards, according to news reports. The search giant was fined a record $2.72 billion by European regulators in 2017 for abusing its dominance of the online search market. In the U.S., the Federal Trade Commission made an antitrust investigation of Google but closed it in 2013 without taking action. (AP Photo/Marcio Jose Sanchez, File)

In this May 13, 2019, photo, former vice president and Democratic presidential candidate Joe Biden interacts with a supporter during a campaign stop at the Community Oven restaurant in Hampton, N.H. North Korea has labeled Biden a "fool of low IQ" and an "imbecile bereft of elementary quality as a human being" after the Democratic presidential hopeful during a recent speech called North Korean leader Kim Jong Un a tyrant. (AP Photo/Michael Dwyer, File)

FILE - In this April 24, 2019, file photo, Democratic presidential candidate Sen. Bernie Sanders, I-Vt., answers questions during a presidential forum held by She The People on the Texas State University campus in Houston. Sanders has a new foil for the 2020 Democratic presidential primary: former Vice President Joe Biden. Biden has been a declared candidate for fewer than three weeks and already Sanders has emerged as one of his most ardent critics.(AP Photo/Michael Wyke, File)

President Donald Trump reaches out to greet supporters after arriving at Chennault International Airport, Tuesday, May 14, 2019, in Lake Charles, La. (AP Photo/Evan Vucci)

FILE - In this Saturday, March 23, 2019 file photo, Worshippers prepare to enter the Al Noor mosque following last week's mass shooting in Christchurch, New Zealand. The death toll from the Christchurch mosque attacks has risen to 51 after a Turkish man who had been hospitalized since a gunman opened fire on worshippers seven weeks ago died overnight, authorities in New Zealand and Turkey confirmed, Friday, May 3, 2019. (AP Photo/Mark Baker, File)

File - In this Wednesday, April 3, 2019 file photo, Israel Electric Corporation employee works next to election campaign billboards showing Israeli Prime Minister and head of the Likud party Benjamin Netanyahu, left, alongside the Blue and White party leaders, from left to right, Moshe Yaalon, Benny Gantz, Yair Lapid, in Tel Aviv. The long-serving Prime Minister Netanyahu is the favorite to win Israel's general election on April 9, but he faces serious corruption charges and a stiff challenge from a former military chief Gantz who has positioned himself as the country's savior. (AP Photo/Oded Balilty, File)