The letter W: Why it has the Nats, Cubs and HubWallet up in arms

District-based Evolution Finance is launching a media campaign to garner public support for its 2-year-old trademark fight with Major League Baseball, something the owner of website WalletHub casts as a David-and-Goliath battle.

At issue: the letter W, and whether people who see it will confuse the block-style W in WalletHub’s logo with the Washington National’s legacy W from the team’s days as the Senators, or the Chicago Cubs’ W, flown on a flag on those (ahem, too rare) occasions when the team…