Peter King, a senior Republican congressman in the US, is launching a hearing into what he describes as a rise in violent extremism in the country.
King, who is the chairman of the Homeland Security Committee in the House of Representatives, will focus on whether or not American Muslims have become "radicalised".
Demonstrations have been held by both Muslim and non-Muslim Americans, decrying King's hearings as a repeat of the infamous "witchhunt" hearings held by senator Joe McCarthy decades ago.
The King hearings will begin on March 9.
Al Jazeera's Kristin Saloomey reports from New York.
Source: Al Jazeera