Why did the US Senate reject the Treaty of Versailles following world war 1?

The US Senate rejected the Treaty of Versailles primarily due to concerns over the League of Nations, which many senators believed could entangle the United States in foreign conflicts and compromise its sovereignty. There was also significant political opposition from isolationists and some Republicans, particularly Henry Cabot Lodge, who advocated for amendments to the treaty. Ultimately, the lack of bipartisan support and differing views on international engagement led to the treaty's failure in the Senate.