What began as a probe into a renovation project at the Fed’s headquarters is now widely viewed as “political retaliation” by Trump over interest-rate policy. The move has not only pushed the long-running policy rift between the White House and the central bank to the brink of an unprecedented constitutional clash, it has also directly undercut Trump’s own choice for the next Fed Chair – leaving the world’s most important central bank at risk of a “power vacuum” in five weeks’ time.

This is not a simple legal case; it is an open-air “maximum pressure” campaign. Its real target is the independence of US monetary policy. Markets worry that if the executive branch tries to use handcuffs instead of debate to bend the central bank to its will, the consequences will go far beyond Wall Street volatility and could end up redefining the boundaries of the modern central-bank system.

Event Timeline: From “Renovation-gate” to a Constitutional Crisis

The spark for this crisis was the multi-year, multi-billion-dollar renovation of the Federal Reserve’s Washington headquarters. Trump has long attacked the project as a cost overrun, hinting that there may be “serious misconduct”, or even “theft and kickbacks”, involved.

On that basis, the Department of Justice opened a criminal investigation into Powell in January, focusing on whether he may have committed perjury when testifying before Congress about the project in June 2025.

However, the true nature of the episode quickly became clear in the ensuing statements from both sides. Powell has bluntly called the investigation a “pretext”, arguing that the real reason is the Fed’s insistence on setting interest rates “based on the public interest rather than presidential preference”, and its refusal to bow to Trump’s pressure for large rate cuts.

Despite huge pushback from members of his own party, Trump on 2 February explicitly refused to halt the investigation and instructed Washington US Attorney Janine Pirro to “see this through to the end”. This marks a new phase in the executive branch’s direct assault on central-bank independence.

Republican Senator Thom Tillis, a key member of the Senate Banking Committee, was the first to draw a clear red line, vowing to block any Fed Chair nomination until the investigation is fully resolved. His stance has received support from some lawmakers on both sides of the aisle, rapidly transforming what began as a policy dispute into a case of the legislature acting as a check on the executive.

Key Focus: Kevin Warsh May Not Be Able to Take Office Smoothly

Trump’s strategy of “pursuing this to the very end” has unexpectedly brought his own political agenda to a standstill. At the very moment he is demanding a full-throttle investigation, he has already nominated former Fed Governor Kevin Warsh as the next Chair.

The obstruction threatened by Tillis and others has effectively thrown Warsh’s confirmation process into paralysis.

This has created an urgent constitutional and legal dilemma: if the deadlock persists, who will lead the Fed when Powell’s term expires on 15 May?

Under existing law, the White House or the Fed’s Board of Governors may have the authority to appoint an acting Chair.

However, this kind of “power vacuum” scenario would be completely unprecedented, and in itself would send a powerful signal of uncertainty to financial markets. Even more importantly, it would directly derail Trump’s political plan to have Warsh quickly change course on monetary policy once in office – delivering rate cuts to stimulate growth.

Three Far-Reaching Impacts: Markets, Institutions and the Global Order

1. The Market’s Immediate Fear: Loss of Independence and Policy Noise

The Fed’s independence is the cornerstone of global confidence in dollar assets. When political forces intervene in the central bank via judicial means, they fundamentally damage market trust in the predictability and professionalism of monetary policy.

Investors will be forced to add a substantial “political risk premium” to the future interest-rate path. The result is a structurally higher level of market volatility.

2. Long-Term Institutional Damage: A Permanent Scar on Central-Bank Independence

Regardless of how the investigation ultimately ends, the episode has already set a dangerous precedent.It sends a clear signal to future Fed Chairs: taking a stand against the White House on key policy decisions may expose you to personal legal risk.This will subtly erode policymakers’ willingness to make tough but necessary choices, and could nudge monetary policy, consciously or not, closer to the rhythm of the political cycle.

3. Shifts in the Geopolitical Financial Order: A Blow to the Dollar’s Institutional Appeal

Globally, central-bank independence has long been a pillar of the modern financial system.The US now appears to be undermining its own credentials – weakening the institutional appeal of the dollar and of US financial markets.For international investors seeking to diversify their assets, and for countries that already question US financial governance, this may accelerate efforts at “de-dollarisation” and the search for alternative safe assets.