I don't imagine Elizabeth Warren is going to be voting for any of Trump's cabinet picks, let alone the Labor Secretary. Trump has made a mockery of politics with the people he has chosen, and the smart people in Congress aren't going to let him get away with it so easy.
No, Warren will not vote for Trump's Labor Secretary pick because Warren wants to appear to constituents like she is against Trump. Warren wants to do what she thinks her constituents want her to do, and she thinks that they want her to appear to oppose Trump. She will make things hard for Trump because she is not a capitalist.
Elizabeth Warren will never vote for Trump slaver secretary nominee, nor will she vote for any of trumps nominees for any Cabinet head position. The woman has made it clear that she is no fan of Trump, and no fan of America. She is there to do nothing but make a lot of noise and blow a lot of hot air. The country would be far better off if she just retired and went away.
No, Warren will not vote for Trump's Labor Secretary pick because she will stand up for what she believes in. In many ways, she is the opposite of Donald Trump. She is intelligent, an excellent leader, and thinks about what she says. She should not confirm any of his picks.