Make the unicorn the national animal. Why? Because it's elegant, majestic, and festive. It represents America at it's finest.
Put the unicorn on the flag, US currency, the President's bedspread, and the Presidential seal.
The president likes unicorns, so he will enforce this.
Nick Trosen (unicorn enthusiast) will pay for it. Most likely to succeed in majestic activities.
BECAUSE UNICORNS ARE AWESOME! THEY REPRESENT UNITY, get it?