The lawmakers warned that the purchase “could result in increases in costs, reductions in competition, or diminished service offerings for consumers,” and would endanger the Federal Communications Commission’s Lifeline program, which provides discounted phone service to low-income consumers. They also encouraged the FCC to “thoroughly review” the proposal and its effects on consumers. Sens. Richard Blumenthal (D-Conn.), Sheldon Whitehouse (D-R.I.), Dianne Feinstein (D-Calif.), Ron Wyden (D-Ore.) and Edward J. Markey (D-Mass.) signed the letter, which was addressed to acting FCC chairwoman Jessica Rosenworcel.