Here are some of the hidden State of the Union details you might miss on TV

During the president's speech, he is entirely surrounded by almost every single member of Congress, the cabinet, the Supreme Court, the joint chiefs of staff, and a large share of the Capitol Hill press corps.

The event is the most packed the Capitol will be all year.

There is a small group of lawmakers who will camp out in the aisle seats of the House chamber as much as six hours in advance in order to be in position to shake hands with the president, ask for an autograph, or whisper something in his ear about a policy pet project.

Journalists covering the speech are seated directly above the president.

From the press gallery, you cannot actually see the president during the speech. But the vantage point gives reporters a perfect view of the entire audience to gauge individual reactions among members of Congress, the cabinet, the joint chiefs of staff, and the Supreme Court.

The president will often point to specific guests during his speech, citing acts of heroism and bravery and why they should be honored during the State of the Union. Members of Congress will also invite special guests and family members to sit in the galleries above.

Lawmakers who are particularly big fans of the president but might not get a lot of face-time with him will rush over to the president as he exits the chamber to seek an autograph.

During Trump's first address to a joint session of Congress in 2017, which was not technically a State of the Union, he signed an autograph for North Carolina Republican Rep. Virginia Foxx.

Every year, one member of the president's cabinet is selected to not attend the address in the event of a catastrophic attack. This person is referred to as the "designated survivor."

Seated behind the president are always the vice president (who is president of the Senate) and the speaker of the House.

When Trump takes the stage on February 5, Pelosi will return to her seat on the dais for the first time since 2010.

Occasionally a member will venture to the other side, but for the most part, Republicans and Democrats divide the room and sit according to party. In 2018, Oklahoma Republican Rep. Markwayne Mullin sat with Democrats during the address.

Members of Congress often seek higher office and run for president, meaning a future president or presidents could be among the crowd.

Already, several Democratic senators and representatives have launched 2020 presidential campaigns.