Pennsylvania Democrat Sen. John Fetterman reportedly stunned onlookers with his outfit at a D.C. dinner. Fetterman, who has consistently been attacked from some on both sides for his refusal to wear formal clothing, is seen in photos wearing a tuxedo hoodie along with his shorts, a Fetterman signature. The news was flagged by HuffPost senior politics reporter Igor Bobic. ALSO READ: Trump goes silent on ‘serious voter fraud’ after long trashing New Hampshire as ‘rigged’ “Fetterman very on brand by showing up to a fancy DC dinner in a tuxedo hoodie and shorts (he’s even got cufflinks on the slee…