Democratic Pennsylvania Sen. John Fetterman on Wednesday officially endorsed New York GOP Rep. Elise Stefanik as the next U.S. ambassador to the United Nations (U.N.). President-elect Donald Trump nominated Stefanik for the post last month, which would require her to resign her House seat, but she still needs to be confirmed by the Senate. Former South Carolina Gov. Nikki Haley held the post in Trump's first term. Fetterman said that he always planned to confirm Stefanik, but appeared even more confident after the pair had a discussion on Capitol Hill. Trump's nominees have been meeting with senators this month to...