While in the case of Hillary Rodham Clinton, it is understandable to refer to her as "Hillary", to distinguish from Bill (though if she is elected President, she will be likely President Clinton, just as now President Bush refers to W.); however, it does seem quite common to the refer to female politicians by their first name, which is undesirable since it implies that female politicians are seen as personal friends rather than leaders.
Which other female politicians are referred to by their first names?