Should I lie to people calling on behalf of one candidate or another?

I’ve been getting call after call from candidates running for various offices here in Georgia. Last night, there was one for Kelly Loeffler – one of Trump’s biggest supporters and someone who anathema to me.

The human called talked for a while and then asked “Can Kelly count on your vote?”. I said “you’ve got to be kidding!” and hung up.

Should I have said “yes”, thereby making him think that I was supporting her? (and potentially misleading them to overconfidence).

What’s the most anti-candidate action to take when confronted with this situation?