moscow kremlin thursday call u.s. decision withdraw congressional press credentials russia rt broadcaster status foreign agent unite state unfriendly step kremlin-backed rt wednesday night publish letter executive committee congressional radio television correspondents gallery say channel congressional press credentials withdraw due registration foreign agent unite state mean rt reporters able much access congress foreign media unfriendly step deeply disappoint kremlin spokesman dmitry peskov tell reporters conference call thursday unite state decide designate rt foreign agent retaliation washington describe russia attempt meddle 2016 u.s. presidential election something moscow repeatedly deny response russia introduce law allow designate u.s. foreign media foreign agents peskov say russian parliament might give emotional response new congressional restrictions rt kremlin call u.s. congress move rt tv station 'very unfriendly