wedge issue
noun
an issue that divides or causes conflict in an otherwise unified group: Abortion is a wedge issue for the Republican Party.
Origin of wedge issue
First recorded in 1990–95
Words nearby wedge issue
wedel,
wedeln,
wedge,
wedge bone,
wedge heel,
wedge issue,
wedge pressure,
wedge resection,
wedge tomb,
wedge-and-groove joint,
wedge-and-groove suture
British Dictionary definitions for wedge issue
wedge issue
noun
an issue that is likely to cause division between the members of a group