The Trafalgar Group is a opinion polling and survey company based in Atlanta, Georgia. They utilize methods to increase the weighting of so called "shy, pro-Trump" voters which they argue to be underrepresented in most polls. [1]
During the 2016 United States presidential election, Trafalgar Group was the only polling firm showing Donald Trump winning the state of Michigan, which he ultimately did, and – according to RealClearPolitics – "nearly the only" one correctly predicting Trump's win in Pennsylvania.[7]
During the 2018 United States elections, Trafalgar Group accurately predicted both a Republican "Ron DeSantis gubernatorial victory in Florida – as well as Republican Rick Scott winning the Senate race there." Trafalgar also correctly predicted 7 of the 9 "battleground" senate races the firm polled in 2018. Those states, along with Florida, included: Michigan, Montana, Missouri, North Dakota, Texas, and West Virginia
https://en.wikipedia.org/wiki/Trafalgar_Group