He knows Congress.
He knows Congress critters.
He can totally rebut any and all Clinton claims of 1990's economic prosperity under the Pervert-In-Charge.
Being a heartbeat away from the Presidency he would be a life insurance policy for Trump and anti-impeachment insurance.
He would totally own any debates.
I tend to agree. Gingrich would work fine.
Lets face it, there are very few in D.C. that will even be considered. Gingrich would fit the bill.