A member of the Republican Party, Caldier was elected to the Washington House of Representatives in 2014, defeating incumbent Democrat Larry Seaquist.

[5] In 2012, Caldier joined others to lobby the Legislature to restore funding to adult dental care for those on Medicaid, and was successful.

In 2014, Caldier challenged incumbent Democratic State Representative Larry Seaquist for Washington's 26th house district, seat 2.

[10] She served on the following committees during the 2024 session: Healthcare & Wellness; Innovation, Community & Economic Development, & Veterans; and Regulated Substances & Gaming.

It was later revealed that Caldier's exit stemmed from allegations that the House Republican leadership had failed to provide reasonable accommodations for her disability.

Caldier publicly stated that Wilcox's resignation and the subsequent election of new leadership, particularly Rep. Stokesbary and Rep. Steele, influenced her decision to return.

Caldier was accused of violating a workplace policy on retaliation after she identified some of the staff members involved in Spokane Airport incident to the press.

[15] The second report concluded: Caldier’s actions were retaliatory and bullying; she lashed out at the witnesses not only by disclosing their names, but by portraying them as political operatives.

This was a failure of respect, dignity, and civility, in violation of the Legislative Code of Conduct…Caldier did not make much, if any, effort to walk back the disclosures; rather, she proclaimed that to be pointless because she was going to be investigated anyway.