Slow down Van. Sadly 20th century politics have turned political terms on their head so to understand what Charles Koch meant, you have to understand a bit of history. What you think when you hear the term classic liberal actually classical liberal and what he means are 2 different things. Fact is, most of the founding fathers such as Jefferson and Franklin were themselves classical liberals. So was Thomas Paine whose place in history IMO is sadly not spoken of enough.
The late historian and history professor Ralph Raico penned
this piece about Classical Liberalism reprinted by the free market libertarian Mises Institute and gives a pretty good discussion on the topic. I'm no Koch fan for other reasons but I'm not going to wrongly judge him because terms have been so grossly damaged by political agendas.