I have learned from experience never to get over confident.
Look what happened to Eric Cantor.
Look what almost happened to Warner in VA.
Anything can happen in politics.
Over confidence is one of the biggest mistakes one can make in politics.
From what I've been reading, overconfidence doesn't seem to be an issue here. The RNC and other organizations are pouring a lot of resources into this runoff, with millions in ad buys and a major statewide GOTV effort. They're going to grind into this one all the way through 6 Dec.