> 美國政治之敗 - the failure of American politics
之敗 mean "the defeat of " it doesn't make sense in your example
美國之敗 = the defeat of The United States
when using [之+(n) ] it is better to use single syllable (character) one.
之敗 mean "the defeat of " it doesn't make sense in your example
美國之敗 = the defeat of The United States
when using [之+(n) ] it is better to use single syllable (character) one.