Andrew Daniller at Pew:

A majority of U.S. adults (58%) say the Constitution should be amended so the presidential candidate who receives the most votes nationwide wins, while 40% prefer to keep the current system in which the candidate who receives the most Electoral College vote wins the election. Support for amending the Constitution has increased slightly since the period immediately following the 2016 election. In a November 2016 CNN/ORC survey, roughly half of adults (51%) favored amending the Constitution to eliminate the Electoral College. And in a March 2018 Pew Research Center survey, 55% favored taking this step.