BERLIN — A German parliamentary delegation visiting Washington late last month saw center-left MPs frozen out by the U.S. State Department, people familiar with the matter told POLITICO. German MPs refused to take part in the meeting after their colleagues were blocked — a highly unusual step. U.S. authorities insisted there had been no effort to favor right-leaning parties and that they speak to a “wide spectrum” of politicians during such visits. In a separate encounter, an MP with the far-