From President Trump's speech yesterday about tax reform:
Democrat President John F. Kennedy championed tax cuts that surged the economy and massively reduced unemployment. As President Kennedy very wisely said, "The single most important fiscal weapon available to strengthen the national economy is the federal tax policy. The right kind of tax cut at the right time" -- at the right time, this is the right time -- "is the most effective measure that this government could take to spur our economy forward." That was President Kennedy. (Applause.)
My fellow Americans, this is the right tax cut, and this is the right time.
This quote from Kennedy appears on page 130 of the book JFK, Conservative, which has a whole chapter about Kennedy as a tax cutter.
Whatever one thinks of Trump, the specifics of his tax reform, or its chances of being passed, it's neat to see him citing JFK, just as Reagan and George W. Bush before him did in making the case for their tax cuts.