was any attempt made to assassinate him?
Yes. He was shot by a saloonkeeper
Theodore Roosevelt
On October 14, 1912, while campaigning in Milwaukee, Wisconsin, Roosevelt was shot by a saloonkeeper named John Flammang Schrank. 
what president said speak softly and carry a big stick Roosevelt which country does he belong to? United States when did he become the president? September 1901 what other positions has he assumed? Governor of New York and vice president of the United States
wiki:19617372
Theodore Roosevelt [SEP] Assassination attempt
On October 14, 1912, while campaigning in Milwaukee, Wisconsin, Roosevelt was shot by a saloonkeeper named John Flammang Schrank. The bullet lodged in his chest after penetrating his steel eyeglass case and passing through a thick (50 pages) single-folded copy of the speech titled "", which he was carrying in his jacket. Schrank was immediately disarmed (by Czech immigrant Frank Bukovsky), captured, and might have been lynched had Roosevelt not shouted for Schrank to remain unharmed. Roosevelt assured the crowd he was all right, then ordered police to take charge of Schrank and to make sure no violence was done to him.