Trump upbraided Maguire in the Oval Office on Feb. 14, saying that the intelligence community had handed Democrats political ammunition during a bipartisan briefing a day earlier about efforts to secure the 2020 election. A senior career intelligence officer who worked for Maguire told lawmakers that Russia had “developed a preference” for Trump. She also described other steps Russia is taking, including assistance to the presidential campaign of Sen. Bernie Sanders (I-Vt.).