The Tories have attempted to use a variation on the Reaganism "There you go again" on a few occasions lately. Michael Gove tried it on Ed Balls yesterday on the Daily Politics education debate, but it had no effect. Reagan used it effectively in the debates with Jimmy Carter in the run up to the 1980 election, but Michael Gove is no Ronald Reagan.
This evening, Cameron has used another Republican campaign line, "Read my lips..." which was heard from the mouth of George Bush snr in 1988 when he was facing the might of Michael Dukakis. Cameron used it to make a promise about caring for the elderly and the sick. The only problem with the presidential precedent is that Bush used it to promise no new taxes - a promise he promptly broke while in office.