Here is the coding I'm using in the table. I still can't get it to insert a page break when the POLLING_DISTRICT changes:
{QUOTE{IF{MERGESEQ}=1{Set Key ""}}"{IF{MERGEFIELD POLLING_DISTRICT}<>{REF Key \* MERGEFORMAT } "{IF{MERGESEQ}> 1 ""}(THEN I'VE INSERTED A PAGE BREAK){SET Key{MERGEFIELD POLLING_DISTRICT}}" }{ MERGEFIELD "POLLING_DISTRICT" }
{MERGEFIELD "FULL_NAME" }
ELECTOR ID - { MERGEFIELD ELECTOR_ID }
HOUSE ID - { MERGEFIELD "HOUSE_ID" }