Here's proof that if you repeat a lie often enough, some folks will believe it.
From The Washington Post:
Clinton’s lead now exceeds 2.8 million votes (more than 2.1 percent of the total vote) and continues to grow. Many Democrats hope this fact alone might persuade Republican electors to reject Trump in favor of some alternative. But this hope faces a serious challenge: Half of all Republicans actually think Trump won the popular vote.
In a nationally representative online survey of 1,011 Americans conducted by Qualtrics between Dec. 6 and 12, we asked respondents, “In last month’s election, Donald Trump won the majority of votes in the electoral college. Who do you think won the most popular votes?”
Twenty-nine percent said Donald Trump won the popular vote. This is a slightly larger proportion than in a recent Pew survey in which 19 percent said Trump won the popular vote.
Respondents’ correct understanding of the popular vote depended a great deal on partisanship. A large fraction of Republicans — 52 percent — said Trump won the popular vote, compared with only 7 percent of Democrats and 24 percent of independents.