With Election Day less than a week away, the leading group encouraging Alaskans to vote no on a constitutional convention has raised much more money than its opponents after attracting a broad bipartisan group of supporters and a growing list of influential organizations backing its cause.

Dwarfed in spending, the leading yes group is fighting on two fronts: In secular public forums, supporters are staying focused on a convention as a way to resolve Permanent Fund dividend debates. Meanwhile, some of the same conservative supporters are also campaigning for a convention on social issues, such...