Besides getting shot down in Vietnam.

Best Answer

Senators rarely get the opportunity to really accomplish anything. That's why there hasn't been a senator to become president since JFK. Normally a governor is elected because it is better preparation for the presidency. Also, it is easier to tell what kinds of policies they will propose and their knowledge of economics, working with the legislators, etc.

That is one reason this election is so weird. There was no incumbent and 3 senators running for president. Well, 2 now.