United States broadcaster CNN reported the security incident occurred near the White House in Washington DC late today (local time), citing law enforcement officials.
He was not armed and was carrying a document he wished to deliver to the White House, CNN reported, citing an unnamed law enforcement source.
Officials stopped the auto Saturday night, about a quarter-mile from President Trump's executive residence. "Great response by Secret Service".
It's latest White House intrusion.
Two Secret Service agents arrested the man after two minutes and took him in for questioning.
According to the Daily Beast, a newsletter sent by President Donald Trump's administration featured a story by Washington Post columnist Alexandra Petri and headlined, "Trump's budget makes ideal sense and will fix America, and I will tell you why".
Chaffetz said he sent a letter to Secret Service Acting Director William Callahan about the incident Friday. In a statement, the agency said the individual was detained immediately and criminal charges were pending.
"It makes no sense, and I don't know what in the world they're doing, but it is a total and complete embarrassment".
"The Secret Service can not even keep one person off the grounds - what will they do if 40 terrorists charge the White House?".
Earlier Saturday, another person was arrested after jumping over a bicycle rack in front of the White House.
He was then able to scale an 8-foot vehicle gate followed by a 3.5-foot fence near the East Wing of the White House grounds.