Complex sentence: On 19 June 2015, the Conservative Party's leader Colin Craig resigned following a supposedly controversial interview and previous disagreements with the party's former press secretary Rachel MacGregor, who had resigned shortly before the 2014 general election.
Split into simpler sentences: On 19 June 2015, the Conservative Party's leader Colin Craig resigned. Dissatisfaction had also been expressed over Craig's demeanour towards the party's former press secretary Rachel MacGregor, who had resigned just before the 2014 general election.