Complex sentence: After suspending his campaign, Wiegand re-engaged the primary against the appointed replacement to whom he lost the primary 55% to 45% but endorsed the winner, Bob Pritchard (R.--Hinckley).
Split into simpler sentences: After suspending his campaign, Wiegand re-engaged the primary against the appointed replacement. Joe lost the primary 55% to 45% but endorsed the winner, Bob Pritchard (R.--Hinckley).