The US Dollar (USD), long considered the world's safest asset, is experiencing unusual turbulence. The cause is US President Donald Trump's repeated attacks on the Federal Reserve (Fed), the independent institution responsible for steering US monetary policy.
The attempt to sack Fed Governor Lisa Cook, despite her appointment until 2038, marks a turning point in the ongoing tug-of-war between the White House and the central bank. An offensive which, according to many analysts, is likely to have a lasting impact on the Fed's credibility, and therefore on the trajectory of the US Dollar.
An unprecedented attack on the Fed's independence
Since his return to the White House, Donald Trump has stepped up his criticism of the Fed, which he deems too cautious in its rate cuts.
The American president took things a step further by announcing the dismissal of Lisa Cook on the pretext of financial irregularities.
Cook immediately contested the decision, pointing out that the President does not have the legal authority to dismiss a Fed governor.
This confrontation paved the way for an unprecedented legal tug-of-war, undermining the central bank's image of independence.
Historically, the Fed has been shielded from political pressure to guarantee financial stability and contain inflation.
By directly attacking its members, Trump is calling this principle into question, at the risk of bringing the world's leading power closer to less reassuring models, such as that of Turkey, where political interference led to the collapse of the national currency.
Immediate market reactions
Investors were quick to react. The US Dollar lost ground against the Euro (EUR) and the Japanese Yen (JPY) after the announcement targeting Lisa Cook.

US Dollar Index (DXY) 4-hour chart. Source: FXStreet.
At the same time, yields on short-term Treasury Bonds fell, reflecting expectations of a more accommodating Fed that would likely yield to political pressure. Long-term yields, on the other hand, showed the opposite trend, a sign that markets fear renewed inflation and a loss of confidence in US debt on the part of foreign investors.
The result is a steeper yield curve, symptomatic of growing tensions.
"The Fed's credibility is now at the heart of the problem," said Brian Jacobsen, chief economist at Annex Wealth Management, quoted by Reuters. "If independence is compromised, the risk premium demanded by investors on the dollar and Treasuries will rise."
What future for the US Dollar?
In the short term, the trajectory of the USD will largely depend on the Fed's decisions at its forthcoming meetings.
The market is already anticipating several rate cuts between now and the end of the year, encouraged by Donald Trump, but also by signs of a slowdown in the US economy.
Should these rate cuts materialize, they could accentuate the downward pressure on the Greenback against other major currencies.
However, its status as the world's reserve currency remains a considerable asset. As long as global markets seek refuge in times of uncertainty, the US Dollar will retain a solid base of support.
The question is whether Trump's repeated attacks, combined with concerns about public debt and the quality of economic statistics, will eventually erode this long-term confidence.
A decisive test for America
The confrontation between President Trump and the Fed goes far beyond a simple technical disagreement over interest rates.
It calls into question the institutional solidity of the United States and its ability to preserve a balance between executive power and monetary independence.
For the markets, the stakes are clear. If the Fed is perceived as a political instrument, the value of the US Dollar and American financial stability could be permanently weakened.
In this sense, the future of the Greenback is as much at stake in Washington as it is on Wall Street. The behavior of Donald Trump, the resistance of Lisa Cook and Fed Chair Jerome Powell, and the reaction of investors will determine whether the US Dollar remains the essential currency of the global financial system, or whether it begins a slow erosion of its credibility.
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