Sen. Amy Klobuchar wants Attorney General Eric Holder to crack down on robocall swindlers and other criminals engaging in mass-marketing scams, especially those targeting seniors.

In a letter Thursday, Klobuchar asked Holder to look for "ways to improve the coordination of resources to bring more criminals to justice and protect American consumers."

Klobuchar said in her letter that seniors are especially susceptible to telemarketing scams. She gave the example of a senior in Minnesota who was targeted by a telemarketing scammer to send $47,000 overseas to claim a car she had supposedly won.

In July Klobuchar introduced the Senior Fraud Protection act, a bill that coordinates the federal response to these crimes and establishes a robust complaint tracking system. The bill would require the Federal Trade Commission to coordinate with other agencies to monitor the market for fraud schemes.

Letter to AG Holder from Amy Klobuchar