I don't think so. There simply aren't that many farmers to get votes from in swing states. IIRC, she only got about 10% more votes in the last election than the other Democratic senator from Minnesota - Tina Smith- who ran an uninspired campaign that relied on getting enough votes in the Twin Cities, Duluth, and college towns to hold down her losses in Greater Minnesota. The Minnesota branch of the Democratic Party - the Democratic Farmer-Labor Party - has kept its rural support better than the national Democratic Party, but its not looking that strong these days and the farming focus is more kept for nostalgia these days than anything else.
To win in 2020 Democrats need to hold the suburbs they won in 2018 and really turn out the metro/inner suburbs. There aren't enough farmers to make fighting for them a viable issue, especially as you can see in people like FarmBoy who seem to view the very idea that a congresscritter might try and represent an urban district as the very height of elitism and snobbery.