The Latest: Trump to attend Army-Navy game Saturday
Ryan told reporters Tuesday that it is "prudent" for Trump to accept congratulatory phone calls.
The statement comes after Mike Flynn Jr. sent numerous posts on Twitter about the conspiracy theories of Pizzagate, a fake news story suggesting a Washington, D.C., pizza shop, Comet Ping Pong, plays a key role in a child sex trafficking ring run by Hillary Clinton.
Police say the conspiracy theory led to violence Sunday when a North Carolina man fired a rifle in the restaurant as he sought to investigate the accusations.
Flynn Jr., who has accompanied his father to presidential transition meetings inside Trump Tower and lists the presidential transition website as part of his Twitter bio, tweeted Sunday night that, "Until #Pizzagate proven to be false, it'll remain a story."
The rally is part of Trump's tour of battleground states where voters helped him defeat Democrat Hillary Clinton.
NATO's chief says the alliance and the European Union are moving forward on deepening cooperation, as U.S. President-elect Donald Trump insists European allies start pulling their own military weight.
NATO Secretary General Jens Stoltenberg told reporters before chairing talks between NATO foreign ministers Tuesday that "we have a momentum now."
Trump lambasted Europeans during the U.S. campaign for not paying their fair share of defense budgets and wants NATO to do more against terrorism.
Trump is slated to hold the second stop of this "thank you" tour Tuesday in North Carolina, less than a week after his bombastic return to rallies at an Ohio appearance that felt more like a raucous campaign stop than a traditional speech by a president-to-be.
At that Cincinnati stop, Trump disparaged the media as "dishonest," inspired loud "Build the wall" chants and stunned his own aides with his surprise announcement from the stage that that he was appointing retired Gen. James Mattis as secretary of defense.