Changes

As efforts were being made to rally enough Republicans to support cloture in order to end the Southern filibuster, Hickenlooper sought to remove some text from Title IV.<ref>[https://www.loc.gov/exhibits/civil-rights-act/civil-rights-act-of-1964.html The Civil Rights Act of 1964: A Long Struggle for Freedom]. ''Library of Congress''. Retrieved May 23, 2021.</ref> His amendment was defeated on June 9, 1964 by a 40–56 vote.<ref>[https://www.govtrack.us/congress/votes/88-1964/s299 HR. 7152. HICKENLOOPER AMEND. TO DELETE FROM TITLE IV, COVERING DESEGREGATION OF SCHOOLS, THE AUTHORIZATION OF FED. FUNDS TO AID COLLEGES IN OPERATING PROGRAMS TO TRAIN SCHOOL PERSONNEL TO HANDLE DESEGREGATION PROBLEMS.]. ''GovTrack.us''. Retrieved May 23, 2021.</ref>

As efforts were being made to rally enough Republicans to support cloture in order to end the Southern filibuster, Hickenlooper sought to remove some text from Title IV.<ref>[https://www.loc.gov/exhibits/civil-rights-act/civil-rights-act-of-1964.html The Civil Rights Act of 1964: A Long Struggle for Freedom]. ''Library of Congress''. Retrieved May 23, 2021.</ref> His amendment was defeated on June 9, 1964 by a 40–56 vote.<ref>[https://www.govtrack.us/congress/votes/88-1964/s299 HR. 7152. HICKENLOOPER AMEND. TO DELETE FROM TITLE IV, COVERING DESEGREGATION OF SCHOOLS, THE AUTHORIZATION OF FED. FUNDS TO AID COLLEGES IN OPERATING PROGRAMS TO TRAIN SCHOOL PERSONNEL TO HANDLE DESEGREGATION PROBLEMS.]. ''GovTrack.us''. Retrieved May 23, 2021.</ref>

While he voted against the passage of the landmark legislation,<ref>[https://www.govtrack.us/congress/votes/88-1964/s409 HR. 7152. PASSAGE.]. ''GovTrack.us''. Retrieved February 18, 2021.</ref> he voted in favor of invoking cloture to end the filibuster led by Southern Democrats<ref>[https://www.govtrack.us/congress/votes/88-1964/s302 HR. 7152. MANSFIELD DIRKSEN MOTION THAT THE SENATE INVOKE CLOTURE ON THE SOUTHERN FILIBUSTER.]. ''GovTrack.us''. Retrieved February 2021.</ref> at the urging of Republican [[Senate Minority Leader]] [[Everett Dirksen]].<ref>[https://www.nytimes.com/1964/06/01/archives/hickenlooper-opposes-closure-till-rights-bill-is-modified-more.html Hickenlooper Opposes Closure Till Rights Bill Is Modified More]. ''The New York Times''. Retrieved February 18, 2021.</ref> This was despite previously being hesitant towards cloture.<ref>[https://www.nytimes.com/1964/06/01/archives/hickenlooper-opposes-closure-till-rights-bill-is-modified-more.html Hickenlooper Opposes Closure Till Rights Bill Is Modified More]. ''The New York Times''. Retrieved May 23, 2021.</ref>

Although initially hesitant,<ref>[https://www.nytimes.com/1964/06/01/archives/hickenlooper-opposes-closure-till-rights-bill-is-modified-more.html Hickenlooper Opposes Closure Till Rights Bill Is Modified More]. ''The New York Times''. Retrieved May 23, 2021.</ref> Hickenlooper voted in favor of invoking cloture to end the filibuster led by Southern Democrats<ref>[https://www.govtrack.us/congress/votes/88-1964/s302 HR. 7152. MANSFIELD DIRKSEN MOTION THAT THE SENATE INVOKE CLOTURE ON THE SOUTHERN FILIBUSTER.]. ''GovTrack.us''. Retrieved February 2021.</ref> at the urging of Republican [[Senate Minority Leader]] [[Everett Dirksen]].<ref>[https://www.nytimes.com/1964/06/01/archives/hickenlooper-opposes-closure-till-rights-bill-is-modified-more.html Hickenlooper Opposes Closure Till Rights Bill Is Modified More]. ''The New York Times''. Retrieved February 18, 2021.</ref> He ultimately voted against the passage of the landmark legislation.<ref>[https://www.govtrack.us/congress/votes/88-1964/s409 HR. 7152. PASSAGE.]. ''GovTrack.us''. Retrieved February 18, 2021.</ref>

===Atomic energy===

===Atomic energy===