The most popular hashtag used by members of Congress in 2017 was #trumpcare, with nearly 12,000 posts using the tag, according to a report by Quorum, a public affairs software platform. Health care hashtags held four of the top five spots and #taxreform was #3.

The most retweeted tweets: Sen. Bernie Sanders takes the winning slot with his tweet: "President Trump, you made a big mistake. By trying to divide us up by race, religion, gender and nationality you actually broughy us closer." It was retweeted 452,940 times, per Quorum.