A Dem Rove would also be interesting. As I've pointed out, Karl's Ohio strategy in 2004, base mobilization, is not new. It was used 36 years previously in California by Robert Kennedy. Admittedly without phone banks, but the same basic idea. "Get the people who already support you to the polls". The master logistician and master strategist could create a Democratic strategic planning masterpiece rivalled only by Karl's OTL efforts. That would require Rove's OTL Dem girlfriend to stay with him, and a few other butterflies along the way.
*Ducks furious liberals*- think of it this way: strategic insight is not limited to the GOP.