New infections were reported to have increased in Wisconsin, Utah, Tennessee, North Dakota and South Dakota in recent weeks.
Video footage of the incident shows two police officers attempting to march the man out of the public meeting in South Dakota.
South Dakota Governor Kristi Noem confirmed the attorney general's involvement in the car accident.
North Dakota, South Dakota, Iowa, Montana, Arkansas, Missouri, Indiana and Illinois are at risk of a spike in coronavirus cases.
More than 460,000 people attended the 10-day event, which did not enforce social distancing guidelines or the wearing of masks.
Researchers said more than 260,000 cases could be linked to the rally, which took place between August 7 and 16 last month.
In addition to the large crowds, there was little mask-wearing and social distancing among attendees, causing health experts to fear it would become a COVID-19 "super-spreader" event.
Several states in the Midwest, including Iowa and South Dakota, have reported an increase in new cases in recent weeks.
The state's department of health refused to release information on which schools and universities have coronavirus cases, after a local reporter submitted an open records request.
Minnesota and Nebraska officials have tied new coronavirus cases—15 and seven, respectively—to people who attended the annual event in South Dakota.
Average daily new cases have been on an upward trend in several states in the Midwest, including Iowa, Missouri, Kansas and Nebraska.
The suspect was detained as a large crowd of bikers crowded around him at the annual rally attended by hundreds of thousands.
The woman got off her motorcycle to approach the calf when an adult bison charged at her, witnesses said. The bison caught the woman's belt and jeans on its horn as it violently swung her around.
The event attended by more than 200,000 people during the pandemic sees first fatalities after three riders collide on a highway.
Winning a rodeo event in cowboy country is a big deal if you're a ranch horse. Doing it less than a year after a razor-wire fence sliced one of your front legs to the bone is a tearful Hollywood comeback.
"I have the greatest belief and faith in our President and his competence," the campaign official said.
The president announced he would be signing an executive order creating a new national garden for historical statues.
"In our schools, our newsrooms, even our corporate boardrooms, there is a new far-left fascism that demands absolute allegiance,' Trump said.
A new poll has found voters strongly support Mount Rushmore ahead of President Donald Trump's Independence Day celebration at the site in South Dakota.
The faces of Presidents George Washington, Thomas Jefferson, Theodore Roosevelt and Abraham Lincoln are carved on the mountain in the Black Hills region.
Sioux Falls is home to a large Smithfield Foods pork processing plant where more than 800 employees have been infected by the coronavirus.
The event hadn't been held in over a decade over fears that the pyrotechnics might ignite the nearby forest.
Noem was one of a handful of governors who refused to shutter their state's non-essential businesses, but one became a coronavirus hotspot nonetheless.
As of Wednesday, there are 545 reported cases linked to the Smithfield plant, with 438 employees testing positive and 107 additional cases from people who have been in contact with the plant's employees.
The drug has shown signs that it could be an effective treatment, but without clinical trials officials have been unable to determine its efficacy and safety.
Smithfield Foods announced it would close one of the United States' largest pork processing plants until further notice in a statement released Sunday.
Officials do not believe any of the cases are related.
Fred Deutsch, who represents South Dakota's 4th District in the state House, is trying to pass a bill banning surgery on transgender children under the age of 16.