What congressman was physically attacked by preston brooke over the issue of slavery

Why was control of the atlantic ocean essential to great britain’s success in world war 2

Why was the sixteenth amendment important to woodrow wilson’s efforts to regulate the economy? a) the sixteenth amendment lowered interest rates charged by banks. b) the sixteenth amendment allowed congress to levy an income tax c) the sixteenth amendment lowered tariffs on imported goods d) the sixteenth amendment allowed congress to break up monopolies

Need ! how did sumner define liberty in the book of "voices of freedom"