(CNN) — President Donald Trump insisted in a letter Wednesday he would deliver his annual State of the Union address from the chamber of the US House next week as planned, telling House Speaker Nancy Pelosi her concerns about security during a partial government shutdown were unfounded.

“I will be honoring your invitation, and fulfilling my constitutional duty, to deliver important information to the people and Congress of the Union States of America regarding the State of our Union,” Trump wrote.

He said the speech would occur on January 29 from the House chamber.

“It would be so very sad for our country, if the State of the Union were not delivered on time, on schedule, and very importantly, on location!” he wrote.

The letter was the latest in a round of squabbling over the yearly speech, which is a constitutional requirement that has been caught up in the back-and-forth over border security and reopening shuttered government agencies.

Pelosi initially wrote Trump last week to inform him the speech should be delayed, or delivered in writing, since the law enforcement agencies tasked with protecting the Capitol during the event are affected by the shutdown.

The Department of Homeland Security later cast those concerns aside, saying its agents and officers had been preparing for months to protect the venue, and would be ready shutdown or not.

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