sentences:  He became a party leader, attended various national conventions and also visited Washington D.C.In mid-1855, as the party disintegrated, Prentice editorialized in support of the Know-Nothing party and the pro-slavery, anti-Catholic and anti-foreigner movement that reached a hysterical level in the 1850s in many parts of the nation.In Louisville this culminated in the Bloody Monday riot of August 6, 1855, in which 22 people were killed as mobs tried to prevent Irish and German citizens from voting on election day.