1982-1998 Helmut Kohl 'led' was chancellor of Germany.
The article in Politico suggests a couple of possible reasons for the celebrity involvement in the 2012 election like for one Barack Obama's star power and liberal appeal plus because of the social media boom which makes the communication much, much easier. Finally this kind of communication with the stars also works well.
Lincoln's plan was the easiest, and the Radical Republican Plan was the hardest on the South.
Herbert Hoover and Al Smith ran in the election of 1928. Hoover and Smith represented different backgrounds, religious ideas; each appealed to different groups of Americans.
Source -- Quizlet