Complex sentence: Rankin won election again to the House in 1940, at the age of 60, defeating incumbent Jacob Thorkelson, an outspoken antisemite, in the July primary, and former representative Jerry J. O'Connell in the general election.
Split into simpler sentences: Rankin won election again to the House in 1940 at the age of 60. She defeated the incumbent Jacob Thorkelson, an outspoken antisemite, in the July primary, and former representative Jerry J. O'Connell in the general election.