Complex sentence: Government formation talks nationwide broke down after Sánchez's failed investiture attempt in early March 2016, and on 28 March the PSOE leadership race was postponed indefinitely until a new government was appointed, due to increasing odds for a fresh election being called for 26 June.
Split into simpler sentences: Government formation talks nationwide broke down after Sánchez's failed investiture attempt in early March 2016. On 28 March, the PSOE leadership race was postponed indefinitely until a new government was appointed, due to increasing odds for a fresh election being called for 26 June.