You’re kidding. These guys were not Conservatives. When faced with exposure of two+ decades of pro-Soviet/Communist infiltration of government, they hung Sen. McCarthy out to dry. Ike was happy to leave office with a enormous Dem majority and a woefully unqualified JFK as his successor, not a mark of a successful “Conservative” President. More like Dubya’s failed administration.
I did not refer to either Nixon or Eisenhower as conservative Presidents. Their instincts were conservative, but they governed as moderates. No small part of their accomplishment though was to make it possible for conservatism to rise and come to power in the form of Ronald Reagan. Notably, personality and circumstances matter. It is quite possible that with GOP Congressional majorities — a luxury neither Eisenhower nor Nixon enjoyed — a Trump presidency may follow GOP conservatives in Congress on many issues. Trump’s alliance with Sen Jeff Sessions as to immigration is to me a key indication that such a dynamic will prevail if Trump wins.