Donald Trump is expected to enter the White House with a Republican House and Senate, as well as a Supreme Court including several jurists he himself appointed, but there is still an unexpected source of pushback that could hamper some of his efforts, according to some legal experts. Trump defeated Vice President Kamala Harris in the presidential election, leading many observers to question whether the former president and now president-elect will be able to push through some of his more controversial policies. Trump’s “ambitious agenda could face pushback from an institution he has done much …