India's relationship with the United States has undergone a remarkable transformation from a period of Cold War estrangement to a comprehensive global strategic partnership. This deepening bond is particularly significant when viewed against the backdrop of India's increasingly constrained and complex relationship with China.

Drivers of India-USA Growing Relationship:

1. Shared Democratic Values: Both nations are the world's largest and oldest democracies, respectively, sharing a commitment to democratic principles, rule of law, and human rights.
2. Strategic Convergence: A key driver is the shared concern over China's growing assertiveness in the Indo-Pacific region. Both countries advocate for a free, open, and inclusive Indo-Pacific, leading to cooperation through platforms like the Quad (Quadrilateral Security Dialogue) with Japan and Australia.
3. Economic Ties: The US is one of India's largest trading partners and a major source of foreign direct investment. Bilateral trade in goods and services has grown significantly, encompassing technology, defense, and energy sectors.
4. Defense Cooperation: India has been designated a 'Major Defense Partner' by the US, facilitating access to advanced US military technology and equipment. Joint military exercises, intelligence sharing, and defense procurement have become routine, enhancing India's defense capabilities.
5. People-to-People Connect: A large and influential Indian diaspora in the US contributes significantly to economic, political, and cultural ties, acting as a strong bridge between the two nations.
6. Counter-Terrorism: Both countries share a common interest in combating global terrorism and have robust intelligence-sharing and counter-terrorism cooperation mechanisms.

Constrained India-China Relations:

India's relationship with China is marked by a mix of cooperation and intense competition, often overshadowed by significant challenges:

1. Border Disputes: The unresolved boundary dispute along the Line of Actual Control (LAC) frequently leads to military standoffs, as seen in Doklam (2017) and Galwan Valley (2020), causing significant mistrust.
2. Trade Imbalance: A massive trade deficit in China's favor, coupled with concerns over market access for Indian goods, creates economic friction.
3. China-Pakistan Axis: China's 'all-weather' strategic partnership with Pakistan, including its support for Pakistan on Kashmir and its investment in the China-Pakistan Economic Corridor (CPEC) through disputed territory, is a major irritant for India.
4. Regional Hegemony: China's growing influence in South Asia and the Indian Ocean region, through its Belt and Road Initiative (BRI) and 'string of pearls' strategy, is perceived by India as an encirclement strategy.
5. Multilateral Forums: China's consistent blocking of India's bid for a permanent seat in the UN Security Council and its protection of Pakistan-based terrorists at the UN further strain relations.

Interlinkage and Strategic Implications:

The growing India-US relationship is, to a significant extent, a strategic response to the challenges posed by China. India, while maintaining its strategic autonomy and engaging with China on various fronts, leverages its partnership with the US to:

• Balance Power: Counter China's regional and global assertiveness, particularly in the Indo-Pacific.
• Enhance Security: Access advanced defense technology and intelligence to bolster its military capabilities against potential threats.
• Diversify Economic Ties: Reduce over-reliance on China by strengthening economic partnerships with the US and its allies.
• Strengthen Multilateralism: Work with like-minded democracies to uphold a rules-based international order, which China is often perceived to challenge.

In essence, the deepening India-US strategic partnership serves as a crucial component of India's foreign policy, enabling it to navigate the complexities of its relationship with China while pursuing its broader national interests and contributing to regional and global stability.