I don’t think she has anything to worry about. She handily won last time. And 4 million dollars is not going to change that in a world where TV money just doesn’t make as much difference as it used to.
This is why republicans are starting to win. People are getting their news from somewhere besides TV, magazines and newspapers. The old world propaganda is over. The money does not matter as much any more. That is why Trump won while being outspent 4 to 1. People can find out all the information they want through other sources. A 30 ad is not persuasive any more.
Hence he effort to shut down patriots on social media, the defunding of conservative websites, and the choking off of search results.
The gods of tech need their balls handed to them via federal action.