U.S. President Donald Trump said he and Russian President Vladimir Putin discussed on Friday the possibility of a new accord limiting nuclear arms that could eventually include China in what would be a major deal between the globe’s top three atomic powers. Trump, speaking to reporters as he met in the Oval Office with Peter Pellegrini, prime minister of the Slovak Republic, also said he and Putin discussed efforts to persuade North Korea to give up nuclear weapons, the political discord in Venezuela, and Ukraine during a call that stretched over an hour.