2022 was the midterm election year in the United States，and there has been many unexpected political results. Although the Biden administration has not responded well to issues such as inflation and immigration，it has achieved relatively positive results on issues such as congressional legislation，chief justice appointments，and midterm elections，resulting in a higher approval rating than expected. The Supreme Court overturned the previous decision of Roe v. Wade，which sparked a strong reaction from American society and to some extent was a turning point of Democratic Party’s midterm election situation. The midterm election was the most watched political event in the United States in 2022，and the two parties have launched a fierce political confrontation. At the same time，there is a phenomenon of polarization within the two parties，highlighting the phenomenon of dual polarization. The “red ripples” replaced “red wave” in the end of midterm election，and the Democratic Party’s performance was better than expected. After the midterm election，the congressional landscape has changed，and Biden may not be able to complete the legislation as expected. In addition，Donald Trump announced his candidacy for the 2024 presidential election. Against the backdrop of judicial investigations and the rising challengers within the party，its candidacy prospect is not clear，but Trumpism could have a profound impact on American party politics and political landscape.