The relationship between India and the United States is a complex one, with both positive and negative implications for China. On the one hand, a close partnership between India and the United States could pose a significant challenge to China's rise as a regional and global power. Both countries have a long history of suspicion and rivalry with China, and they share a number of common concerns about China's growing military power, its economic expansionism, and its human rights record.
 

For example, in recent years, India and the United States have conducted joint military exercises, increased intelligence sharing, and deepened cooperation on counterterrorism and other security issues. They have also worked together to counter China's influence in the Indo-Pacific region, through initiatives such as the Quadrilateral Security Dialogue (Quad) and the Indo-Pacific Economic Framework (IPEF).

On the other hand, a close relationship between India and the United States could also have negative implications for China. For example, it could lead to increased tensions between China and the United States, which could have a destabilizing effect on the region. It could also make it more difficult for China to access key markets and resources, which could hurt its economy.

Ultimately, the implications of the India-US relationship for China are unclear. It is possible that the relationship could pose a significant challenge to China's rise, but it is also possible that it could have a more limited impact. The outcome will likely depend on a number of factors, including the future trajectory of the relationship between India and the United States, the pace of China's rise, and the broader geopolitical landscape in the Indo-Pacific region.

In addition to the above, here are some other specific ways in which the India-US relationship could impact China:

• Economically: A closer relationship between India and the United States could lead to increased trade and investment between the two countries, which could hurt China's economy. For example, if India were to join the Trans-Pacific Partnership (TPP), it would create a new free trade bloc that would exclude China.
• Strategically: A closer relationship between India and the United States could give India access to more advanced military technology, which could improve its ability to counter China's military power. For example, India has been seeking to acquire American F-35 fighter jets, which would give it a significant advantage over China in the air.
• Geopolitically: A closer relationship between India and the United States could help to contain China's influence in the Indo-Pacific region. For example, the Quad is a security alliance between India, the United States, Japan, and Australia that is designed to counter China's growing power in the region.

Overall, the India-US relationship is a complex one with both positive and negative implications for China. The ultimate impact of the relationship will likely depend on a number of factors, but it is clear that the relationship is likely to play a significant role in shaping the future of the Indo-Pacific region.