Which president banned christmas trees in the white house?

What are the 6 steps in the scientific method

How did farm families get things they needed, such as cloth, in the mid-1800's

Why did poland, hungary, and east germany join the warsaw pact? a)their people voted to join in free elections. b)their efforts to join nato failed. c)they wanted to stop the spread of communism in europe. d)they were soviet satellites that had little choice.