We got the South Carolina Senator on Capitol Hill Thursday, and he explained why he and POTUS were spotted mask-free at Trump's D.C. hotel Monday night ... mere hours after 45 finally supported wearing one on Twitter.
Graham tells us they had all just had dinner -- and obviously they can't cover their faces while eating -- but more to the point ... he claims they'd all just been tested.
Listen carefully though ... the Senator balks a bit when our guy asks if everyone in the room at the Trump hotel -- where he was seen yukking it up with Congressional hopeful Madison Cawthorn -- was also tested.
Regardless ... Graham has recently been pushing for SC residents and all Americans to mask up in order to turn the corner on surging COVID-19 cases. His state is currently seeing a spike in hospitalizations, as are so many others.
As we reported ... Trump announced Thursday that the RNC in Jacksonville was canceled because of COVID concerns.