By that reasoning, the Governor will most likely also get a bump when he formally announces his run. Even senator Paul got a bump from his announcement, and he leads Clinton in Colorado by a few more points than all others. Watch Rubio announce next, and watch his poll numbers also get a boost.
I want Walker to be the last to announce. The others can have their short time and then the real nominee with arrive and get the show on the row. The rest are just running for money and other positions. Walker is also busy running a state. The rest are taking a break from writing policies.