Prove it.
To denounce a candidate is to say that you shouldn’t vote for them. To vote for a candidate who you say doesn't deserve a vote is self-contradiction.
Define “tactically correct”.
A tactically correct action is an action that best furthers your goals.
And lost. Because the electorate was shifting between 1908 and 1916, so there's no reason to think that the results of 1912 would've been the same as 1908.