Hey there, from CNN. I'm David Rind with the five things you need to know for Wednesday, April 1st.

Quick trivia question for you. When's the last time a sitting president attended Supreme Court oral arguments?

As far as we could tell, the answer is never, until today that is.

President Donald Trump made the short trip to the High Court this morning to watch oral

arguments in a massive case that could have huge implications for undocumented immigrants'

children born on U.S. soil. In short, the Trump administration is trying to limit

automatic birthright citizenship. However, no lower court has agreed with Trump. The Supreme Court

already upheld the Citizenship citizenship clause of the 14th

Amendment of the Constitution more than 100 years ago, and Congress enshrined the rule into law twice.

So it's an uphill battle, to say the least. The 14th Amendment says, quote, all persons born or

naturalized in the United States and subject to the jurisdiction thereof are citizens of the

United States.

And early on during arguments this morning, Chief Justice John Robert seems skeptical of the

Trump administration's argument that a key part of that clause, subject to the jurisdiction

thereof, is flawed.

The examples you give to support that strike me as very quirky, you know, children of ambassadors, children of enemies

during a hostile invasion, children on warships, and then you expand it to the whole class

of illegal aliens are here in the country. I'm not quite sure how you can get to that big group

from such tiny and sort of idiosyncratic examples.

We can expect a ruling at the end of the term

in late June or early July.

Got to take a break when we come back.

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