Donald Trump made the crucial investments in the major research projects that the development of new vaccines required.

But Biden made sure that the organization required for the vaccine to reach the people of this vast country became a reality.

The pace has been increased from 100 million to 200 million in 100 days.

Now new challenges await.

The supply of vaccines is large here in the United States, but the willingness to vaccinate among important groups of people is small and it will require great convincing efforts to persuade so many to vaccinate themselves that the country reaches flock immunity at the end of the summer.

Tax increases to expect

The stimulus package was unique in many ways.

Not only because the payments of cash to the American families continued, but also because for the first time something similar to a child allowance was introduced in the United States.

The Biden administration also continued, like Donald Trump, to support US companies at a time when business was at a standstill.

The whole package was popular even among Republican voters.

The problem now that President Biden is also presenting an extremely extensive investment in US infrastructure is that the investments will be financed with the help of very sensitive tax increases, which will be very difficult for Congress to accept.

USA back on the international stage

Some of President Biden's first decisions were to join the country to the Paris Agreement and show the world that the United States was back as a leading nation on the international stage.

The same was true of re-entry into the World Health Organization, WHO.

What we have seen is a total redirection of foreign policy.

And that's a bit like Joe Biden's first hundred days.

Biden has done everything not to be Donald Trump, but especially the new climate goals will be difficult to achieve.

Lack of cooperation

Throughout the election campaign, Joe Biden marketed himself as the politician who would unite the country by working across party lines.

We have not seen much of that in the first hundred days.

The stimulus package was pushed through without the support of the Republicans and even continued plans can become a reality without cooperation.

It gives the Democrats short-term victories, but deepens the division in the country.

The minority leader in the House of Representatives, Republican Kevin McCarthy, states that he has not spoken to Joe Biden at all since he took the oath of office.

And when the acute migration crisis along the country's southern border with Mexico is to be resolved through new reforms, cooperation will be required.

Not least, this also applies if the country is to agree on new guidelines for the heavily criticized American police.

The basic problem - the divided nation - remains and has rather deepened.

According to CNN, only 7 percent of Republicans believe Joe Biden is doing a good job.

These are the gaps President Biden must reduce in order to be remembered as a successful leader.

Hard pressed

Time flies, especially if you have 1600 Pennsylvania Avenue as your address.

Just over three months have passed since that chilly January day when Joe Biden was announced as the country's 46th president and now the political window, to get through big decisions, is about to close.

The closer we get to the mid-term elections in 2022, the less likely the country's congressional members in both parties will be to support major revolutionary bills. Biden's first victory in Congress may well turn out to be the biggest.