Complex sentence: On the dawn of the final month of campaigning, Barr appeared on National Public Radio, and discussed his political positions, including those on health care, a topic which had rarely been discussed by Barr over the course of his campaign.
Split into simpler sentences: On the dawn of the final month of campaigning, Barr appeared on National Public Radio, and discussed his political positions. The topic had rarely been discussed by Barr over the course of his campaign.