Democrats are poised to take control of the Minnesota Senate after defeating Republican incumbents in key races around the state. DFL candidates needed to flip only a net of 4 seats to recapture the majority, giving them control of the chamber for the next four years. The Senate was their power base in state government for nearly 40 years until 2010. That’s when the GOP captured the Senate for the first time in nearly four decades. But Senate Republicans struggled after taking power, with a sex scandal reshuffling top leadership and a related lawsuit running up big legal bills.