There are 17 Democratic women in the U.S. Senate. With her announcement Sunday, Minnesota Sen. Amy Klobuchar becomes the 4th of those to join the 2020 presidential race. She follows Kamala Harris (CA), Kirsten Gillibrand (NY) and Elizabeth Warren (MA). Warren officially joined the race on Saturday. There are now nine* Democrats seeking the party's nomination.
Interestingly, of all the Democrats that may run in 2020, none are from a state that was as closely-contested as Minnesota in 2016. Hillary Clinton prevailed here by just 1.5% over Donald Trump, as it nearly joined the blue wall states of Michigan, Pennsylvania and Wisconsin that powered Trump's win. On the other hand, Minnesota has not voted for a GOP nominee since Richard Nixon in 1972, the longest such state single-party streak^ in the nation. The Cook Political Report has started the state as Leans Democratic in 2020.
* Including two that have formed exploratory committees; one step short of a formal announcement.
^ Washington, D.C. has had 3 electoral votes since 1964. It has never voted Republican. Curious about your state's streak? See our Same Since Electoral Maps.