Complex sentence: With Scullin out of the country for the whole second half of 1930, Fenton (as acting Prime Minister) and Lyons (as acting Treasurer) were left in charge and insisted on pursuing deflationary policies, arousing great opposition in the Labor caucus.
Split into simpler sentences: With Scullin out of the country for the whole second half of 1930, Fenton (as acting Prime Minister) and Lyons (as acting Treasurer) were left in charge. They insisted on pursuing deflationary policies, arousing great opposition in the Labor caucus.