system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: In Canada, why are the Conservatives running constant attack ads on Trudeau, but none on the higher polling NDP?

What political advantage does it give to attack the party that is not expected to challenge for the majority, but ignore the one that is?
gpt
The goal of of the Conservatives is to divide the votes so both parties doesn't get enough votes to beat the conservative. They focus on the Liberals because historically, they are the main rival of the conservative. It also has the purpose to make the NDP looks like a 3rd party that is just there to divide the vote.