Sen. Catherine Cortez Masto and Republican challenger Adam Laxalt are facing questions from the Federal Election Commission about their campaign contributions. Business Insider reports, the FEC this week sent letters to the candidates, asking about campaign filings showing various donations that appear to surpassing the $2,900 legal contribution limit for individuals, as well as the $5,000 contribution limit for political action committees. Cortez Masto’s filing reportedly include excessive contributions from 155 people, and Laxalt’s from 56 individuals in the third quarter.