The Republican National Committee on Wednesday filed a lawsuit against the House select committee investigating the January 6, 2021, insurrection, revealing a recent effort by House investigators to unearth information about how the party and the Trump campaign used an email software to spread misinformation about the 2020 election and fuel violence that led to the US Capitol attack.

(SOURCE) https://www.cnn.com/2022/03/09/politics/rnc-lawsuit-january-6-subpoena-salesforce/index.html