Congress passed 113 laws, 87 of them substantive, in 2015, making it the most productive first session since 2009.
Republicans, especially conservative Republicans, were more likely to view the institution unfavorably.
When GOP presidential candidates meet in Las Vegas tonight for their sixth debate, terrorism, foreign policy and national security are expected to be major topics.
How the Supreme Court decides a redistricting case from Texas could affect Hispanic voting strength and House representation from coast to coast.
There are stark socioeconomic differences within the GOP when it comes to issues like poverty, health care and education.