Rep. Rick Nolan (D-Minn.) will not seek re-election in 2018, reports Brian Bakst of Minnesota Public Radio.

Why it matters: Minnesota's 8th district is among the most competitive in the country, with President Trump winning 54% of the vote in 2016. Nolan, who won by just 2,000 votes in the 2012 race, is the 17th Democrat to announce he will not seek re-election.