[5] As of the 2021 Connecticut Redistricting Project, the district includes Fairfield, Easton, Newtown, and most of Bethel[6] Hwang was endorsed by State Senator John McKinney.
[7] McKinney vacated the Senate seat to run for governor, but subsequently lost in the Republican primary to Thomas C.
[8][9] In 2016, Hwang received re-election endorsements from Robert H. Steele, John Kasich, the Connecticut League of Conservation Voters, and the National Federation of Independent Business.
[10][11][12] During the 2016 election, he retained his seat as state senator for the 28th district, winning with over 60% of the vote; and defeating Democratic nominee Philip Dwyer.
"[28] As of 2020, Hwang is the ranking member of the state Senate committees on housing, higher education, public safety and security, and transportation.
[36][37] In 2014, the Connecticut State Elections Enforcement Commission investigated Hwang over an allegation of failure to disclose campaign purchases.
[18] In December 2017, the state Elections Enforcement Commission ruled that the failure to disclosure was unintentional, and directed him to correct his filings.
[18] In 2018, some of Hwang's campaign signs included copyrighted art from the nonprofit, nonpartisan organizations Hate Has No Home Here and Ben's Bells, without permission from the groups.
[19] On Election Day in 2019, a high school student volunteer argued with Hwang at Fairfield's District 1 polling place about socialism.
The exchange eventually got heated and brought the student to tears, prompting a Facebook post from her mother that circulated on social media.