AL: 75%
VA: 63%
AR: 57%
NC: 57%
TN: 57%
OK: 53%
TX: 49%
MN: 47%
ME: 46%
MA: 45%
CO: 44%
CA: 39%
UT: 34%
VT: 31%
VT: 63%
CO: 53%
UT: 50%
MA: 49%
ME: 49%
CA: 46%
MN: 45%
TX: 41%
OK: 39%
TN: 35%
NC: 35%
VA: 34%
AR: 32%
AL: 23%
Biden+Bloomberg states
AL: +52
VA: +29
AR: +25
TN: +22
NC: +22
OK: +14
TX: +8
MN: +1.6
Sanders+Warren states
VT: +31
UT: +16
CO: +9
CA: +7
MA: +3
ME: +2
But even under these unrealistic assumptions, Biden is hurt more by Bloomberg being in, than Sanders is by Warren being in.
Meanwhile, a Biden+Bloomberg combo improves Biden's performance in CA and across the South. So on net the split field seems better for Bernie