What is the significance of one party controlling the white house?

One party can almost pass all the bills they want and keep the other party from passing really any

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

answer; the federal reserve system;