WASHINGTON - The presumed incoming Democratic chairman of the U.S. House Judiciary Committee said Tuesday that he planned to investigate the drastic spike in hate crimes in the nation and whether federal investigators had wrongfully targeted racial and ethnic minorities instead of focusing on white supremacist groups.

In a letter to the Justice Department, FBI and Department of Homeland Security, Rep. Jerrold Nadler of New York complained that the agencies had all failed to address prior inquiries about hate crimes and surveillance activities that Democrats made when Republicans controlled the House of Representatives.

“To date, we have received little or no substantive response to any of these communications," Nadler wrote.

"In the next Congress, this committee will likely examine the causes of racial and religious violence, assess the adequacy of federal hate crimes statutes and scrutinize targeted domestic surveillance of specific groups," he added.

Nadler's plans to scrutinize hate crimes and the federal response to them center on one of several topics that Democrats plan to probe when they take over control of the House in January, having made gains in the midterm elections.

Amazon question

Other topics that Democrats have signaled could be probed include whether the Trump administration tried to block AT&T from acquiring Time Warner; whether the administration tried to retaliate against Amazon for political purposes; and whether Trump scrapped plans to relocate the FBI's headquarters to avoid harming his business interests in the nearby Trump Hotel.

New data released in November by the FBI found that hate crimes jumped 17 percent in 2017 and anti-Semitic attacks spiked 37 percent.

The data were released not long after a gunman burst into a Pittsburgh synagogue and killed 11 worshippers while shouting, "All Jews must die."

The shooting came the day after federal authorities arrested a man in Florida for mailing explosive devices to critics of Trump, including former Secretary of State Hillary Clinton and former President Barack Obama.

Justice Department spokeswoman Kelly Laco, in response to Nadler's letter, pointed to a list of hate crime cases the department had brought since last year.

The cases included the high-profile prosecution of James Alex Fields, currently on trial for killing a woman by driving his car into a crowd of counterprotesters after a white nationalist rally in Charlottesville, Va., last year.