He could win his own in Texas, but unless he's in contention for another states I don't see him getting another.
He could get one in CA.
Which one? Nancy Pelosi's district? Maxine Waters' district? Unless he's in the 20s there I think it's seriously hard to see him doing well.
He just gave massive speechs at Berkeley, Chico, and UCLA for a few thousand college students each, so he can win at least one out of 53 there, and of course his own district in Texas. And Montana seems to be very much in line with his ideology (see Schweitzer, Tester, etc), so he's got at least a shot there.