Recent party unity scores suggest that a majority of one party votes against a majority of the opposing party about __________ percent of the time

Presidents with high levels of __________ have an easier time influencing Congress, while those with low levels find influencing Congress more difficult

a. public approval b. executive privilege c. impeachment power d. third-party connections

What threats to internal validity are reduced when you switch from a one group pretest-posttest to a static comparison group design? What potential threat is introduced?

What will be an ideal response?