Complex sentence: Initial design proposals were made in 1926, but extensive political wrangling and indecision delayed the project and even the new bridge itself, which finally opened in 1932 after a connection to the Arlington National Cemetery was made via Memorial Drive.
Split into simpler sentences: Initial design proposals were made in 1926, but extensive political wrangling and indecision affected the project. Arlington Memorial Bridge finally opened in 1932 after a connection to the cemetery was made via Memorial Drive.