U.S. President Donald Trump turned his populist rhetoric to tax reform on Wednesday, calling for "pro-American" business tax cuts as a way to create jobs and telling Congress that it needs to deliver.

Speaking at a manufacturing company in Springfield, Missouri, Trump called on Democrats to join his tax overhaul effort, which he said would also cut taxes and simplify the sprawling U.S. tax code for the middle class. But he offered few specifics, and tax reform will be an uphill task in Congress.

"We must reduce the tax rate on American businesses so they keep jobs in America, create jobs in America and compete for workers right here in America," Trump said in his first presidential speech specifically on tax reform, one of his key 2016 campaign issues.