Business Insider is reporting that a study done by scientists at the University of North Texas is claiming that US counties where Donald Trump held a campaign rally in 2016 saw a 226% increase in reported hate crimes over similar counties that did not hold a rally,.

The study measured the correlation between counties that hosted a 2016 campaign rally and the crime rates in the months that followed. The scientists used the Anti-Defamation League’s map that measures acts of violence and compared the counties that hosted a rally with others that had similar characteristics, including minority population (including the LGBT community), location, and active hate groups.

The “Trump effect” as it is being called according to the ADL’s 2016 data, included reports of vandalism, intimidation and assault in it’s findings.

The FBI’s Universal Crime report in 2017, reported that overall across America hate crimes increased 17 percent over 2016. Recent research also shows that reading or hearing Trump’s statements of bias against particular groups makes people more likely to write offensive things about the groups he targets.