Here’s a stumper: In the Treasury financial reform proposal, who comes in for more regulatory retooling: Fannie Mae, or your average 14-man venture capital shop? If you said venture capital, you understand why one of America’s greatest competitive advantages is now at risk in Washington.

As part of their regulatory redesign, Team Obama and Congress still don’t have a plan for reforming the giant taxpayer-backed institutions like Fannie that caused the credit crisis. Yet they’re moving to rewrite the rules for investing in...