If there is no still-valid, stupid rule that forbids him to do this... that’s what I’d be deathly afraid of... then go go go go go go GO Mr. Adelson! That would give Newt (or Newt’s super-PAC boosters) a budget that could effectively counter the Romney sh*tstorms.
The way he could immunize himself (and more importantly, Newt) from such criticisms is to announce that he will match the highest fundraiser among the remaining candidates. So if Romney raises $5M, Adelson writes a check to Newt’s Super PAC for the same amount.
That said, Newt needs a lot more than that to properly counter all the mud Romney has already been slinging at him...