Elizabeth Warren | KERA News

Elizabeth Warren

A day after Senate Republicans invoked a conduct rule to end Sen. Elizabeth Warren's speech against the nomination of Sen. Jeff Sessions as U.S. attorney general, a 1986 letter from Coretta Scott King urging the Senate to reject Sessions' nomination as a federal judge is gaining new prominence.

The words were those of Coretta Scott King, widow of the Rev. Martin Luther King Jr.

But they resulted in a rarely invoked Senate rule being used to formally silence Sen. Elizabeth Warren, D-Mass.