Can a "rally" save Romney in OH?

The current delusion from conservatives is that, after the nomination, Republicans will "rally" to their nominee and provide the edge needed for a Romney victory. 

I'm going to examine the recent polling of one swing State and determine how realistic this "rally" scenario really is. 

Quinnipiac polled OH (1246 RV, ±2.8% MoE, 3/20 - 3/26) and found Obama leading 47/41. The survey's demographics are here. The cross-tabs are here. 

The weighted numbers from the sample show 29% self-identify as Republicans. These Republicans break 83/7 for Romney when matched up against Obama. Beyond that, 4% "don't know", 2% "won't vote", and 3% will vote for "someone else". 

Let's assume that the 7% of Republicans saying they will vote for Obama flip to Romney, and that all 4% undecided Republicans also rally to Romney. This is 11% of the Republicans. 11% of 29% is a whopping 3.2% of the general electorate. Obama leads by six. 

This, then, is the conclusion: if every Republican in Ohio flips to Romney, and actually turns out to vote, Obama would still win the state by about three points. There is about 5% margin of error (MoE) in the Republican-only sample, which could go either way. The best-case scenario is that a Republican "rally" could put Romney ahead by two points, and that's stretching at the limits of reality here. 

Whatever it would take to rally every Republican would probably alienate Independent voters (33% of the sample). Even a five-point gain for Obama among Independents would make the race a virtual toss-up, and that would occur if half of the undecided Independents voted for Obama. If Obama won over the 5% of undecided Democrats (33% of the sample), that would also make the race a virtual toss-up. Again, this is taking into account the unrealistic assumption that all of the poll's margin of error falls to Romney's advantage. If only half of the MoE falls on Romney's side, then Obama narrowly wins.

Romney fails to win a majority of white voters (45/41), with 7% undecided. With the white vote as 83% of the sample, Romney would gain 5.8% of the general electorate if he could pick up every undecided white voter. This would make the race a toss-up. He would need the MoE of 2.98% to actually pull ahead, but it would be a narrow victory.

A Republican "rally" could make OH a "toss-up" at best, and that's a coin flip that Romney cannot afford to lose. Obama, on the other hand, can afford to lose it and pick up those electoral votes in other States.