An obscure electric-truck and aircraft maker in Ohio vaulted to the forefront of U.S. politics on Wednesday after President Donald Trump tweeted the company, Workhorse Group Inc., was buying a General Motors Co. plant in its home state.

Shares of Cincinnati, Ohio-based Workhorse WKHS, +2.31% rallied as much as 86% to $1.27 after the presidential tweet, their highest since September. The stock is down 90% from a record closing high of $11.41 on April 7, 2016. Shares were recently up 48%.