    *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.
FYI - A primary election (nominating primary), also referred to simply as a primary, is an election in which voters in a jurisdiction select candidates for a subsequent election. In other words, primary elections are one means by which a political party nominates candidates for the following general election.