On Thursday, a key Senate official advised Democratic lawmakers that the chamber’s rules do not allow them to include a minimum wage increase in President Joe Biden’s first COVID-19 relief legislation. The ruling from the parliamentarian means that Vice President Kamala Harris could decide the fate of one of the Democratic Party’s most significant campaign promises — but it remains unclear what she will end up doing.

As the presiding officer of the Senate, Harris — who has long touted her support for a $15 minimum wage — can now use the power her predecessors have used to ignore the advisory opinion and fulfill Biden’s campaign promise to boost the wage. A confidential memo we obtained that is now circulating on Capitol Hill spells out exactly how that could be accomplished.

However, White House chief of staff Ron Klain this week declared that Harris will refuse to use that power — a decision that would effectively put the Biden-Harris administration in the position of potentially killing the prospect of minimum wage legislation for the foreseeable future. Immediately after the parliamentarian’s ruling, the White House issued a statement reiterating Klain’s comment, declaring that “Biden respects the parliamentarian’s decision.”