What is the term for when a state does not recognize a federal law? rejection removal nullification secession

How did the constitution of 1917 try to resolve some of the problems that started the mexican revolution

Is the weather changing? consider the data of severe weather that includes tornadoes occurring throughout the u. s. over the last four years. compare the severe weather for the last three years. then compare the first three months of 2017 with that data. based on previous years, what might the prediction be for weather during 2017?

Why was there so little resistance in the war from the german people?