system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why does Iowa always choose the presidential candidate? Why don't we switch states up for every caucus?
gpt
Iowa doesn't choose the presidential candidate. In fact it's only about 50/50 even at predicting the outcome of the primaries. It is however the time that we see actual vote results for the season rather than polling data. This generally leads to a big shift in campaigns. Donors can flood in or dry up depending on the outcome and momentum that can lead straight to the party nomination can result from that simple fact.