that the moisture from the humid weather of the day contributed to the double misfiring. Lawrence was then restrained, with legend saying that Jackson attacked Lawrence with his cane, prompting his aides to restrain him. Others present, including Davy Crockett, restrained and disarmed Lawrence. On April 23, 1844, then House-Speaker John White was involved in a physical confrontation on the House floor with Democratic Congressman George O. Rathbun of New York. White was delivering a speech in defense of Senator Henry Clay, the Whig nominee for President in that year's presidential election, and objected to a ruling from the Speaker denying him time to conclude his remarks. When Rathbun told White to be quiet, White confronted him and their disagreement lead to a fistfight between the two with dozens of their colleagues rushing to break up the fight. During the disturbance, an unknown visitor fired a pistol into the crowd, wounding a police officer. Both White and Rathbun subsequently apologized for their actions. On July 2, 1915, prior to the United States' entry into World War I, Eric Muenter (aka Frank Holt), a German professor who wanted to stop American support of the Allies of World War I, exploded a bomb in the reception room of the U.S. Senate. The next morning he tried to assassinate J. P. Morgan Jr., son of the financier, at his home on Long Island, New York. J.P. Morgan's company served as Great Britain's principal U.S. purchasing agent for munitions and other war supplies. In a letter to the Washington Evening Star published after the explosion, Muenter, writing under an assumed name, said he hoped that the detonation would "make enough noise to be heard above the voices that clamor for war". In the 1954 United States Capitol shooting, Puerto Rican nationalists opened fire on members of Congress from the visitors' gallery, injuring five representatives. On March 1, 1971, a bomb exploded on the ground floor of the Capitol, placed by the far-left domestic terrorist group the Weather Underground. They placed the bomb as a demonstration against U.S. involvement in Laos. On November 7, 1983, in the 1983 United States Senate bombing, a group called the Armed Resistance Unit claimed responsibility for a bomb that detonated in the lobby outside the office of Senate Minority Leader Robert Byrd. Six people associated with the John Brown Anti-Klan Committee were later found in contempt of court for