New Delhi, Sept. 10 -- Pennsylvania Senator John Fetterman has faced intense criticism from Democratic Party figures and progressive activists after making a surprise virtual appearance at a Republican midterm convention in Dallas.

The Democratic senator used the video address to praise his Republican counterpart, Senator Dave McCormick, and signal his willingness to work with US President Donald Trump on industrial policy. The move triggered an immediate backlash within his own party, according to a report by The Hill.

Fetterman delivered the approximately one-minute address virtually while standing outside a major steel-processing facility in Pittsburgh. Wearing his trademark casual clothing, he described himself as a "common sense De...