Exactly, when your enemy is destroying herself, just stick to the issues, stay above the fray of the opposition’s self-destruction (as in “It’s an internal opposition party squabble.”), and stay energetically engaged with the electorate. Gradually limit campaign rallies to critical battleground states, and begin carpet bombing those states with ads that paint the picture in bold,sharp colors, never pastels.
“Never interrupt your opponent when he is making a mistake.” - Napoleon Bonaparte.