Complex sentence: The Hillary Bus was a grassroots campaign bus operated by Ready for Hillary PAC (now known as Ready PAC) from summer 2014 to spring 2015, in the run-up to the 2016 United States Presidential Election.
Split into simpler sentences: The Hillary Bus was a grassroots campaign bus operated by Ready for Hillary PAC (now known as Ready PAC) from summer 2014 to spring 2015. In the run-up to the 2016 United States Presidential Election.