Of the top six Democrats who broke from their party in 2018, four are no longer in Congress, including Heidi Heitkamp, right. Senators eyeing the presidency, meanwhile, are sticking to their party like glue. Elizabeth Warren had a perfect unity score. (Bill Clark/CQ Roll Call file photo)
After Democrats and Republicans reached record highs sticking together by party on congressional votes in 2017, those numbers nose-dived in 2018 as lawmakers worked across the aisle on high-profile legislation, including a rewrite of the Dodd-Frank financial law, a package dealing with the opioid crisis, spending bills and an overhaul of the country’s criminal justice laws.
CQ’s annual vote study shows that in the House the total number of party unity votes — defined as those with each party’s majority on opposing sides — fell from 76 percent of the total votes taken in the House in 2017, a record, to 59 percent in 2018. That latter figure is the lowest since 2010, the most recent year of unified Democratic control of Congress. Election years typically have fewer votes and 2018 was no exception — the total number of votes taken in the House, 498, was the lowest since 2002.