Explain the geographic context for United States global expansion in the late 1800s?? Please help me ASAP!!

Match the following items 1. formed by theodore roosevelt in 1912 2. republican president 3. a person who currently holds an office 4. democratic president 5. formed by ross perot in 1992 6. to yield or surrender; admit or acknowledge options; a. jimmy carter b. dwight d. eisenhower c.bull moose party d. united we stand party e. concede f. incumbent