Pledged to leave USA if Trump became President.. Yet she still lives in America.

Do these celebrities threaten to leave America thinking the average voter will say to themselves, "Gosh, I don't want Barbara Streisand to leave the country! I better vote for Bernie Sanders instead!" That seems to be the case because none of those who pledged to leave actually kept their word.

He [Donald Trump] has no facts. I don't know, I can't believe it. I'm either coming to your country [Australia], if you'll let me in, or Canada