https://www.cbo.gov/publication/55410
There's some subtlety worth quoting in contrast to the headline:
"CBO estimates that there is about a two-thirds chance that the change in employment would lie between about zero and a reduction of 3.7 million workers."
"There is considerable uncertainty about the responsiveness of employment to an increase in the minimum wage. If employment is more responsive than CBO expects, then increases in the minimum wage would lead to larger declines in employment. By contrast, if employment is less responsive than CBO expects, then such increases would lead to smaller declines in employment. Findings in the research literature about how changes in the federal minimum wage affect employment vary widely. Many studies have found little or no effect of minimum wages on employment, but many others have found substantial reductions in employment."