Booker's record-breaking speech offers Democrats a road map for resistance they hope will motivate their base.

As NPR noted, “The longest filibuster on record was a 1957 speech by then-Democratic Sen. Strom Thurmond of South Carolina — in opposition to the Civil Rights Act — that lasted for 24 hours and 18 minutes.” Technically, Booker’s speech was not a filibuster since the Senate wasn’t holding a debate over a specific bill or nominee.

This speech is not a filibuster and no legislation is being blocked, meaning Booker was able to give a prolonged speech that kept the Senate floor open.

It was fitting that Cory Booker was recounting a story about the late civil rights leader John Lewis as he entered the 19th minute and 24th hour of a historic speech to the Senate on Tuesday evening.

Sen. Cory Booker (D-N.J.) said as he began speaking on the Senate floor Monday night that he intended to disrupt “the normal business of the United States Senate for as long as I am physically able,” citing his belief that “our nation is in crisis.”

Cory Booker stood on the Senate floor and spoke for 25 hours and 5 minutes this week, breaking the modern record for the longest Senate speech ever. Senate rules allow a member who is recognized by the presiding officer to speak for as long as they wish,

Here's a timeline of the topics New Jersey Sen. Cory Booker spoke about during his record-setting speech on the Senate floor.

Civil rights, health care and a local factory are among the topics to have compelled lawmakers to break the 20-hour mark on the Senate floor in past decades.