LAS VEGAS (AP) — The USPS announced on Tuesday it will follow through with its plan to reroute Reno-area mail processing to Sacramento, a move that drew bipartisan ire from Nevada lawmakers while raising questions about the rate at which mail ballots can be processed in a populous part of a crucial swing state.

Postmaster General Louis DeJoy has cast the permanent measure as a cost saving move, but federal, state and local lawmakers have complained about a lack of transparency in the process that could slow mail throughout the region.

Under the plan, all mail from the Reno area will pass through Sacramento before reaching its destination — even from one side of the city to the other.

Democratic Secretary of State Cisco Aguilar, the state’s top election official, previously said moving operations could slow the processing of mail ballots, and “has the potential to disenfranchise thousands of Nevada voters and would unquestionably impact the results of Nevada’s elections.”