Democrats believe that the rich should pay more taxes than the poor. They also believe abortion and immigrants should stay in the USA. They do not want you to have guns, and they support LGBT marriage.
Meanwhile, the Republicans oppose that rich should pay more taxes, they believe that everyone should pay fair taxes. They say abortion is wrong, and immigrants cannot stay in the USA. They want you to have guns, and they do not like LGBT marriage, they think it is wrong.
Hope it helps!