As I need to let you answer this, I am going to provide answers on both sides.
Democratic Party:
A member of the Democratic party generally believes in a strong Central government that provides a robust social safety net for the people. In the modern age, Democrats are more hesitant to use military might overseas and would rather spend the money investing at home. Democrats are broadly in favor of a woman's control over her own body and support gay marriage and the legalization of marijuana. Support welcoming immigration policies.
Republicans:
A member of the Republican party in the modern era believes in a weaker central government with more power to the states. They broadly believe in the power of the market to provide and are interested in the private sector helping citizens to succeed. They believe in a strong military and in using it. Republicans are split along religious lines as to abortion and gay marriage but are united in their opposition of weaker immigration policies.