With less than three months until Election Day, the fight for control of the US Senate is entering a critical stretch, with nine states emerging as the contests most likely to determine which party controls the chamber next year.
Democrats see an opening as President Donald Trump's approval rating and economic standing weaken. A recent CNN/SSRS poll put Trump's approval at 34%, while 65% of Americans said his policies had worsened economic conditions. Democrats also held an eight-point advantage on the generic congressional ballot.
