During an Ontario election campaign during the McGuinty era, I called in to a Hamilton Liberal campaign office, asking if the Liberals thought strategic voting was a good idea (McGuinty had come out asking voters not to "split" the anti-Conservative vote). The campaign worker on the phone said, "Oh yes. That's our policy".
When I asked if McGuinty was going to tell Liberals to support David Christopherson in order not to split the vote, there was dead silence on the other end of the phone, followed by, "No, that's not what we're advocating". I said, "I thought so". I've always remembered that conversation.