The Republican National Committee is losing a top staff member to the influential U.S. Chamber of Commerce.

Sara Armstrong, chief of staff to RNC chairwoman Ronna Romney McDaniel since January, is leaving the party for a new job as the chamber's vice president.

Armstrong is among a handful of staffers to leave the RNC this summer — several of the party's data staffers are looking toward the door after the party replaced its chief data officer, according to Politico.

An RNC official told The Hill that Armstrong got "an amazing opportunity that she couldn't turn down" and that party officials are excited for her next step.

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The party currently has an interim chief in place and will begin the search for a new chief of staff as Armstrong transitions to her new role.

Armstrong has been an influential presence within the party organization for a decade. She joined the RNC after working in as first lady Laura Bush's deputy chief of staff, working as the party's deputy chief of staff during the 2012 elections and its chief operating officer during the 2014 cycle. During the 2016 elections, she helped to manage both the convention and the inauguration.

At the Chamber, she'll play an integral role in one of the largest outside groups in politics. The business group is a key player in elections up and down the ballot and spent $29 million in 2016 in outside election spending, according to OpenSecrets.