How to join the party in America?

Speaking of "joining the party", in China, my impression is whether it is an easy thing, generally referring to joining the China * * * production party. At school, if you can't help talking about your girlfriend, you shouldn't consider joining the party. When you have enough conditions, you must first write an application, organize an exam, fill in a volunteer form, take an oath, etc., before you can join the party. I don't know if China still talks about bloodline when he joins the Party. In America, it's much easier if you want to join the party. Specifically, one of the following two methods can be adopted. First of all, put a tick on the name of a political party in the election registration form, and you will be the glorious party member of the party. Another way is more formal, that is, you call or write an email to the local office of a political party, and they will send you some forms quickly and politely. Fill in your name, address, telephone number and other contact information. Some people have to pay a small fee, such as 20 yuan, and you will be their party member. In fact, people's political inclinations will change over time. According to the things around us, an immigrant was penniless when he first set foot on American soil. What he expects is that the country will implement a more relaxed employment policy for foreign immigrants and establish more social security systems for low-income groups. But whether homosexuality is legal, I don't think so. At this time, he is probably a loyal supporter of the Democratic Party. If he can register to vote, put a tick on the name of "Democratic Party", and this person who used to be a party in China suddenly becomes a Democratic Party. But with the improvement of his education, he gradually found a good job, and even when his income was classified as "rich" by Obama, he had to bear more taxes. He became dissatisfied with the Democratic Party and hated Obama's ideas. I think the Democratic Party is an opportunistic party that encourages laziness and whips fast cattle. I hope that Romney will be in power in the country, so that he will not pay more taxes and pay less taxes for the poor. It is not difficult to see that there is no absolute right or wrong in all opinions, but the society will satisfy their demands first who has the loudest voice. No matter what class you are in, people say "politics is dirty". The political parties in the United States are not supported by taxpayers' money, which is very different from that in China. Political parties in the United States spend a lot of money on general elections with only one purpose, hoping that the general elections will make it easier for them to make money in the future.