Who should the democrats run in 2020 to challenge trump?

How did the russian revolution impact world war l ?

Alarge increase in gas prices creates a demand for cars with good gas milage. it takes months for car companies to make these cars. how do you describe this market for cars

Which of these was not a key difference between northern and southern states at the constitutional convention? wanting to protect states’ interests vs. a government with strict rules having more, larger cities vs. having fewer, smaller cities wanting to protect agriculture vs. protect industries having many enslaved people vs. using less enslaved labor