India, Oct. 7 -- President Donald Trump was asked by reporters outside the White House on Tuesday what he believed was the No. 1 issue for American voters heading into the midterm elections.

His initial response was brief: "I don't know exactly."

Trump returned to Washington, D.C. after an event in Maryland on Tuesday. Wearing a red "USA" hat, he spoke with reporters outside the White House when a reporter asked him what he saw as the top issue for American voters.

Trump replied, "Well, I don't know exactly."

He then pointed to what he described as improvements in the US economy.

"When you look at the American voters, we're doing better. We're taking in trillions of dollars of investment. We have more jobs. You know, more people are ...