Please read up on Soros's Secretary of State project. It was started after the 2000 election. Soros like many leftist believes Bush only won in Florida due to Katherine Harris being the SoS. They believe if they control the SoS office they can win everywhere. That is how they got the Franken Senate seat. The Soros thing is a red herring.
As another poster pointed out, the SoS already has the duty to have their elections meet Constitutional requirements.