Complex sentence: After 1952, Martin joined the moderate wing of the Republican Party and supported Dwight D. Eisenhower's internationalist outlook (through support of foreign aid), supporting federal aid for school construction, and supporting Lyndon B. Johnson's Economic Opportunity Act of 1964.
Split into simpler sentences: After 1952, Martin joined the moderate wing of the Republican Party. Such changes in his positions included support of Dwight D. Eisenhower's internationalist outlook (through support of foreign aid), supporting federal aid for school construction, and supporting Lyndon B. Johnson's Economic Opportunity Act of 1964.