Booker won't win but would do better than McGrift. I say go for it. We tried the centrist Dem strategy of running Republicans to beat Republicans and it doesn't work, not unless the math has genuinely turned to favor Democrats (i.e. Colorado) in which case a more progressive candidate could have won anyway.
Not
always true, especially in the case of Manchin. And while Donnelly, Bredesen, and McCaskill all lost, they dramatically over performed their states partisan leans.
The actual policy of Democratic candidates doesn't matter so much, it only really matters as it relates to messaging.
Moderates (think Manchin, Peterson, Klobuchar) and progressives (think Cartwright, Brown, Schweitzer) can both dramatically over perform partisan lean in their states. Messaging matters far more than actual policies.
And moderates (think McGrath, Braley, Christy Smith, Feltes) and progressives (think Kara Eastman, Zuckerman, Gina Ortiz Jones) can both pathetically flop and fail.