Evan McMullin, the independent presidential candidate, said Donald Trump frequently avoids dealing with his “fragile campaign” by holing up in his New York residence.

{mosads}”I’m hearing from people inside his campaign that there are times now when he hides in his apartment and doesn’t meet with any people,” McMullin told Business Insider.

“When he campaigns he goes out to a place, he has to fly back home to New York. This is a fragile man and a fragile campaign and I’m not quite sure what’s going to happen in the days and weeks ahead of him. I’m not sure the [Republican National Committee] can continue to support him given his weakness as a man and as a politician and as a candidate for the presidency.”

McMullin also commented on the Trump campaign shake-up that saw former chairman Paul Manafort depart over alleged ties to pro-Russian interests in Ukraine.

Just before Manafort’s resignation, Trump brought on former head of Breitbart Steve Bannon and a GOP pollster Kellyanne Conway.

“He’s taken some desperate measures with firing his campaign manager and hiring another one, wild swings in his policy positioning. I mean, he’s desperate,” he said.

McMullin raised doubts about whether or not Trump “will make it through this campaign.”

McMullin was a former chief policy director for the House Republican Conference. He announced that he would run for president as an independent on Aug. 8 after a firm anti-Trump stance.