California's primary is just days away, so if you haven't been following the races it's probably time to get read in.
One of the most talked about congressional races in the state is the one for California's 4th congressional district, which stretches from the Sacramento suburbs of Roseville and El Dorado Hills, north to Lake Tahoe and south to Yosemite.
Incumbent Tom McClintock is facing a handful of challengers all hoping to oust the Republican representative.
Watch the video above for a quick break-down on who the candidates are and why it matters.
Want more explainers on the 2018 races?
Learn about the race for Sacramento County District Attorney here.
Learn about the race for Sacramento County Sheriff here.
Learn more about the race for California's governor here.
Learn more about the race for California's 10th congressional district here.
ABC10 photojournalist Barbara Bingley contributed to this report.