Complex sentence: He also found himself the head of an inexperienced government as no current ALP parliamentarian had previously served as a minister, leaving him no choice but to entrust sensitive portfolios to men more used to criticising government actions.
Split into simpler sentences: He also found himself the head of an inexperienced government, as no current ALP parliamentarian had previously served as a minister. This lack left him no choice but to entrust sensitive portfolios to men more used to criticising government actions.