Sens. Marco Rubio (R-Fla.) and Sherrod Brown (D-Ohio) have asked the Labor Department for a full federal probe into Amazon’s labor practices, with the two lawmakers citing recent reports that suggest potential employment law violations, “troubling working conditions,” and “improper treatment” of Amazon employees. Rubio and Brown said in a Dec. 20 letter to U.S. Labor Secretary Martin Walsh (pdf) that a series of cases and worker claims “raise serious concerns regarding Amazon’s employment practices,” including questions about possible violations of wage and hour laws and occupational safety rules. “Workers’ concerns are clear,” the pair wrote. “Amazon’s business practices seem to prioritize profit over people.” In support of their request for the probe, the two senators cited a number of cases that they say are “illustrative of chronic mismanagement” at the e-commerce giant. They noted, for example, that the National Labor Relations Board (NLRB) found that Amazon wrongfully terminated a worker …