Operation Chaos?

OK - whats up with this "Operation Chaos" I hear about. Rush Limbaugh is supposedly driving a few Republican to vote for Hillary, just so she doesn't get blown away by Obama. I guess its supposed to create a real mess when Convention time comes. I can't tell if its working as planned, but there doesn't seem to be much harmony in the Democrat party. Hillary seems to be riding this thing to the end. That will surely stir the pot if it gets to the DNC.