The NDP are funny to hold up as an example to two-party-brained types of how things play out in a country where there is actually a viable left-wing third party. For various reasons, but mainly because even in Canada liberals scream at NDP supporters to "vote strategically" (vote liberal) so they can keep the conservatives from coming into power. So the lack of a viable third party in the US doesn't even matter. These people don't want things to get better.