From CNN, I'm AfomaDK, with the five things you need to know for Tuesday, April 1st.

President Donald Trump's second term is facing its first major political battle today.

Voters in Wisconsin and Florida are casting their ballots in key elections.

Two Wisconsin Supreme Court candidates are going head-to-head in a race that will either retain the court's liberal majority or flip the court back to conservatives.

In Florida, two vacant U.S. House seats are up for grabs to replace former Republican representatives Matt Gates and National Security Advisor Mike Waltz.

Vacancies that only tighten the GOP's slim majority.

Here's CNN Politics senior reporter Stephen Collinson.

Say a Democrat got to within about 10 points in one of these races.

If you're a Republican who is sitting on a 10 point margin or less, and there are plenty of

them in your constituency, you're

really going to start worrying about what's going to happen in the midterm elections next year,

the impact of Trump's policies, and that might make you think a little bit differently

about how things are going in the United States and the direction the White House is taking. The federal government has suspended several research grants at Princeton University.

That's according to a letter from the university president and obtained by CNN.

Here's CNN's Gloria Pasmino.

The university was notified by multiple agencies, I should say, including the Department of Energy, NASA, and the Department of Defense.

So the university president in his letter addressed anti-Semitism and the fact that the university

is trying to do something about combating it. But it's not yet clear yet if this is the source of the administration's funding cuts.

So that part is still unclear.

We've seen the Trump administration target other universities,

including UPenn, over some other parts of their agenda

that they are not in agreement with.

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