With Hillary Clinton moving to get a new primary held in Michigan, the question is this: Even if she got her way, and a revote did happen, would it even make much of a difference to the overall contest?

Hillary personally visited Michigan today and aggressively called on Obama to support the plan for a revote, which the Obama camp has not done yet. You can view Hillary in Michigan here...

But what if she did get her revote? Would it matter? Just how much would a new primary help her close the delegate gap?

The answer: Probably not by much, and possibly quite the opposite.

We explain why, after the jump.

First of all, it isn't at all certain that Hillary would win the contest by a large margin, which she would need in order to put a real dent in Obama's pledged delegate lead. The Michigan Democratic electorate is about one-quarter African-American, with the largest Democratic pockets in places like the urban center of Detroit, the college town of Ann Arbor, and the working-class Flint region. Assuming Obama wins in Detroit and Ann Arbor, while Hillary wins Flint and similar areas plus the rest of the state, it could make for a close race.

A lot of information can probably be gleaned from the original rogue primary in January, which Hillary won against a low-level shadow campaign for her only real opponent on the ballot, "Uncommitted." However, Hillary only won it by a 55%-40% margin, as an actual candidate against a complicated effort to get people opposed to her to cast a protest vote in a primary that did not count for anything.

According to the Michigan Democratic Party's claimed delegate totals, that spread gave Hillary 73 delegates against 55 for Uncommitted — a +18 net take for Hillary if all of those other delegate slots went for Obama, as any hypothetical deal to seat any delegates based on the January primary would inevitably involve doing. Eighteen pledged dels is a decent-sized haul, but not really enough to significantly cut into Obama's edge.

And as it is, the revote almost certainly wouldn't even give her such a large victory. Exit polling showed that a real primary would have resulted in Hillary getting 46%, Obama 35%, and John Edwards 12%. And with a recent Rasmussen poll showing a new primary tied at 41% each, the groundwork is clearly there for a close contest.

So let's look at three scenarios for a new primary, all with Hillary winning by different margins and assuming delegate proportionality for Michigan's 128 new delegates across the districts:

Hillary wins 52%-48% = Hillary +5
Hillary wins 55%-45% = Hillary +13
Hillary wins 60%-40% = Hillary +26

The first two of those are far more likely than the third. Bottom line: It's hard to imagine Hillary netting more than 15 delegates, and she'd be likely to net a good deal less.

When it comes to pledged delegates, a Michigan revote is unlikely to alter the race's underlying dynamic in any meaningful way.