What is the difference between “Classical Liberalism” as a concept and being considered a “Liberal” on the U.S. Political Spectrum?

 Ronald Reagan believed in small government.  Based on my lecture, how was his belief somewhat, not entirely, contradictory?

 Based on my lecture, how did the ideologies of President George H.W. Bush and President George W. Bush differ?

 Based on my lecture, which parts of Communism and Marxism are arguably still relevant today and which part(s) are not?