Rep. Mimi Walters was the only House member who reported using Cambridge Analytica data in 2016 election

"Rep. Mimi Walters (R-Irvine) was the only House member who reported using Cambridge Analytica for voter data during the 2016 election cycle.

The firm, which has been facing a storm of scrutiny for using allegedly ill-gotten Facebook data on millions of the site’s users, also provided data for the campaigns of two Republican senators. "

From the Los Angeles Times, 3/22/18