Complex sentence: The only Republicans to win Lincoln County since the Great Depression transformed its politics have been Dwight D. Eisenhower, Richard Nixon and Ronald Reagan, who each carried the county twice--with the exception of 1968 during landslide GOP victories across the nation.
Split into simpler sentences: The only Republicans to win Lincoln County since the Great Depression transformed its politics have been Dwight D. Eisenhower, Richard Nixon and Ronald Reagan, who each carried the county twice. With the exception of 1968, all these post-Depression Republican wins in Lincoln County occurred during landslide GOP victories across the nation.