I know without knowing that state and national political consultants and operatives far above my pay grade are already thinking along these lines because their goal is to keep Wisconsin on its far-right track:
* Gov. Walker resigns if the John Doe probe gets fatally close to him. Depending on the timing, it could moot the recall effort which is already delayed by Republicans' insistence on the most laborious signature verification procedures imaginable. Since the Doe probe and related events could last a long time, it is possible that Walker could win the recall election, then have to leave, much as Richard Nixon won re-election in 1972 with Watergate events already underway - - but then resigned when his culpability and involvement in illegal activities was clear.
* A resignation would elevate Lt. Gov. Kleefisch to the office, and, again depending on the timing, could moot the recall against her, too. If that happened before the recall election, I believe - - and correct me if I am wrong - - it would start another year-long clock before she could be recalled.
* If he left before he'd spent it, Walker's trove of recall-related fundraising could either be returned to donors, gathered up again as a Walker support/legal-defense-if-needed fund, or transferred and/or re-contributed in part or in whole to Kleefisch's campaign account, depending on the law. It's their money, and events may push it elsewhere.
* Conservative backers, if they cared, would find and fund a slot for Walker somewhere, depending on what happens with the John Doe and whether they choose to extend their loyalty, and how far.
Walker is ultimately a pawn in the right's game, and if need be, is replaceable.
Keep an eye on how this particular scenario, as Dan Bice described it on January 22nd:
In an interview last week, Walker said he has not been contacted by investigators for the Democratic district attorney but would be open to sitting down with Milwaukee County prosecutors to discuss the issues they are investigating.
"I certainly would be willing if they asked me to in the future," Walker told the Journal Sentinel's Madison bureau. "Like I said, no matter who it might be about, we'd be more than willing to in the future."
Asked if he has hired his own attorney for advice regarding the John Doe investigation, Walker declined to answer.
"I've not been a subject of this," the first-term Republican governor said. "At some point in the future, if I am, I'll discuss that with you."
His campaign hired Steve Biskupic of Michael Best & Friedrich in late 2010, when officials subpoenaed campaign emails. Last year, Walker's campaign paid Michael Best nearly $110,000 for "compliance issues."