Public opinion, political socialization, parties and/or media

modern technology such as social media allows for candidates to more easily connect to voters ... Having two major political parties represented. Coalitions.

no statements but ok.

the statement that best describes the idea of manifest destiny that was used in the 19th century would be that "it was fate that the united states would continue to  expand westward," since people thought the us was "destined" to do so.