Maligner n. : One who maligns.

Example:
Why is it that we always seem to lose wars when Republicans are in power?

Taxonomy
encyclopedia, dictionary, evil, lign, Synonyms, malign, malignant tumor, thesaurus browser, online dictionary, asperse, slander, libel, character, Free Online Dictionary, untrue statements, maligned, antonyms, Middle English.

Defination from the web:
maligner in the Online Dictionary. Meaning of maligner. Pronunciation of maligner. Translations of maligner. maligner synonyms, maligner antonyms. ... maligner - one who attacks the reputation of another by slander or libel. backbiter, defamer, libeler, slanderer, ...