An NBC News correspondent who interviewed Pennsylvania Senate candidate John Fetterman says an on-air remark she made about him having difficulty following part of their conversation should not be seen as a commentary on his fitness for office after he suffered a stroke. But reporter Dasha Burns’ comment that Fetterman appeared to have trouble understanding small talk prior to their interview has attracted attention — and Republicans have retweeted it as they seek an advantage in the closely followed Senate race between Fetterman and Republican Mehmet Oz.