acrimony

At least two of those relationships with civilian Pentagon chiefs — retired Marine Gen. James N. Mattis and Army combat veteran Mark Esper — resulted in open acrimony, despite a long-standing reluctance on the part of current and retired military officers to publicly criticize the commander in chief.

Even though King and other Civil Rights leaders managed to rally Christian pastors to their side, the acrimony between Christians over racial segregation and the movement to destroy it underscored political tensions that were already creating schisms within American congregations.

But for all the personal acrimony between them, they've also advanced each other's political ambitions.

As Nelson demonstrates via "Daytime Revolution," the couple’s efforts to preach unity in the face of that era’s deep acrimony is a lesson that we could sorely use today.

The acrimony arguably peaked last month when Megan Gallacher resigned as deputy leader of the party.