"Democrat Party" is the nickname of politics in the United States is not "Democrat Party" when you talk about the Democratic Party. This term is used in a negative fashion or hostile to conservative commentators and members of the Republican party platform, partisan speeches and press releases since 1940.
Some of the reasons for the proposed use of this term. A 1984 article in the New York Times suggest Republicans have started using the term when the Democrats are the party of their own name used to imply "They are the only true supporter of democracy." Republicans worry that "Democracy" advises Democrats [have been] a monopoly, or somehow anointed guardians of democracy concept. "New Yorker commentator Hendrik Hertzberg writes:" There is no great mystery about the motives behind this deliberate misnaming "Democrat Party" is a slur, or intended to -.. An easy way to insult Express Aesthetic judgments are subjective, of course, but the Democratic Party "is a boundary conflict was shouting pretty ugly." Rats. "Political analyst Charlie Cook the modern use of the term for the practice to enforce, rather than a deliberate nickname caused by Republicans . Ruth Marcus says that Republicans will only continue to employ the term because Democrats do not like it.Marcus noted that the differences over the use of the term "significant", and calling Hertzberg use of the term "mild irritation. "
Similar two-word phrases, use "Democrat" as an adjective that is considered controversial when used instead of "Democracy" (as in "democratic ideas"); NPR prohibits the use of "Democrat" as adjective.The term "Democrat Party" is generally used with there is no negative connotation in some places by the Democrats in 1950  Dictionary of American Regional English provides many examples of "democracy" is used as an adjective in everyday language, especially in the northeast