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A senior Trump administration official on Saturday pointed to the 2015 mass shooting in San Bernardino, California, to justify the President's order to ban US immigration from seven Muslim-majority nations.

US President Donald Trump may be having his biggest day of diplomacy yet, speaking by phone Saturday with five world leaders -- most significantly Russia's Vladimir Putin and Germany's Angela Merkel.

President Donald Trump signed three executive actions Saturday that imposed a five-year lobbying ban for administration officials, reorganized the National Security Council's structure and called for a plan to be delivered to him within 30 days on how defeat ISIS, administration officials said.

The White House statement on International Holocaust Remembrance Day didn't mention Jews or anti-Semitism because "despite what the media reports, we are an incredibly inclusive group and we took into account all of those who suffered," administration spokeswoman Hope Hicks told CNN on Saturday.

Serena Williams rewrote tennis' history books once again, this time with sister Venus across the net and her fiance Alexis Ohanian watching from the stands.

There's a lot of confusion about US President Donald Trump's executive order limiting immigration, especially for immigrants already living in the United States and those wanting to travel here. Here are some things you need to know:

In Boston, 48% of children have at least one parent who was born outside the United States. I identify with those kids because I was one of them. My mother and father came from Ireland to Boston looking for opportunity. They found their American Dream, and I got to live mine by becoming mayor of the city that embraced us.

Jack Kingston, the former senior adviser to Donald Trump's presidential campaign, defended President Trump's executive order that placed a ban on immigration from seven Muslim-majority countries.

The Sinclair Lewis novel "It Can't Happen Here," about a gradual fascist takeover of the United States, has joined George Orwell's "1984" on Amazon's list of its best-selling books.

Craig Tiley looked slightly jaded. The Australian Open's tournament director had worked minimum 12-hour days over the past two weeks.

The co-author of a new book about campus rape says that while the problem of sexual assault and rape on campus is real, the numbers have been inflated.

Democratic Sen. Chris Murphy tweeted the image of a dead Syrian child after President Donald Trump issued an executive order banning Syrian refugees from the US indefinitely.

The immigration executive orders signed by President Donald Trump this week could amount to a vast expansion of authority for individual immigration officers and a dramatic increase in efforts to detain and deport undocumented immigrants.

On Friday, President Donald Trump signed an executive order that effectively suspends the entry of Syrian refugees into the United States indefinitely. As he signed the order, President Trump said that this was "to keep radical Islamic terrorists out of the United States."

Iran says it will ban all US citizens from entering the country in response to President Donald Trump's executive order limiting immigration from seven Muslim-majority countries, according to an Iranian Foreign Ministry statement published on state media Saturday.

One of the men detained at JFK airport, after President Trump signed an executive order banning Iraqis from entering the US for 90 days, has been released.

Arizona Rep. Ruben Gallego said Friday that he thinks President Donald Trump is "mentally unstable."

Comedian Bill Maher gives his take on President Trump's first week in office on HBO's "Real Time with Bill Maher."

President Donald Trump said in a new interview Friday that persecuted Christians will be given priority over other refugees seeking to enter the United States, saying they have been "horribly treated."

Japanese Prime Minister Shinzo Abe accepted an invitation Saturday to visit President Donald Trump at the White House next month.