    *NOTE to the author     there is a big difference between the two parties. Democrats are more liberal and Republicans are a lot more conservative.       Note to the Note   The question was related to the PARTIES, not the philosophy of individual members.
Election manifesto is a vision and misssion of contestent political parties that stand for upcoming election. This is an agenda for future plan made by the political parties wittheir the voters. If any political parties win the election that is bound to implement to the same that was pre-committed with the people.
Campaign message. The message of the campaign contains the ideas that the candidate wants to share with the voters. It is to get those who agree with their ideas to support them when running for a political position. The message often consists of several talking points about policy issues.