He's published books authored by Donald Trump, raised millions for his 2024 campaign, and helped him staff Washington with loyalists during the US president's second term.
Now Sergio Gor is set to become Trump's man in India, while also overseeing US relations with other South and Central Asian countries.
Last week, Trump announced that he was promoting Gor, his personnel chief, to be the next US Ambassador to India. He called Gor a great friend and someone he could fully trust to deliver on the agenda.
The 38-year-old's appointment comes at a time when relations between the two countries have become strained due to Trump's punishing tariffs on India.
Gor's appointment has evoked mixed reactions in India, with some observers saying that having a close Trump aide in the post is a positive sign for India-US ties. But others have questioned Trump's decision to share his India envoy with South and Central Asian countries, which includes Pakistan, with whom India shares a tense relationship.
Experts say that Gor's broad regional mandate threatens to expose India to an overreach by Washington in its affairs with Pakistan, including on the Kashmir issue - a red line for India.
The special envoy's additional designation will likely create some challenges, at least in India. India typically prefers not to be hyphenated with Pakistan, says Alyssa Ayres from the Council of Foreign Relations, an American think-tank focussed on US foreign policy.
Lawrence Haas, a former senior White House official, suggested that this might signal to Delhi that Trump believes the ambassador role does not require a full-time commitment, a prospect that could insult Indian leaders.
Lawmakers and analysts in India are recalling a similar situation in 2009 when the Obama administration considered appointing a special envoy for South Asia, a move that India actively protested.
Unlike Obama, Trump is known for his direct approach and even claimed to have facilitated a ceasefire between India and Pakistan, a point India contests. Trump's administration has also pressed for significant trade concessions from India in recent negotiations.
Gor's known connections and friendship with the Trump family, including Ivanka Trump and Jared Kushner, may play a role in his effectiveness as ambassador. However, his lack of diplomatic experience is raising questions about potential challenges that could arise in navigating complex international relationships.