H.R. 7329
Representative William Tuck (D-VA) proposed this bill on June 27, two months before the March. The bill’s ambiguous language about “conduct which would tend to incite a riot” would have allowed the arrest of these “outsiders” as they crossed state lines to organize demonstrations. H.R. 7329 was referred to the House Judiciary Committee, and was never reported on.
H.R. 7329, June 27, 1963; Committee on the Judiciary, Bill Files; Records of the U.S. House of Representatives, Record Group 233.