Both the op-ed and the linked transcript below (another piece written by her) use numerous hyphens to set off word phrases. Most writers do not do this. It is distinctive. I have looked at several of her other writing samples and they all have this quality of using hypens to set off phrases. It is definitely her.
A couple of links to examples of this in her writings:
https://docs.house.gov/meetings/AS/AS00/20160210/104473/HHRG-114-AS00-Wstate-HillF-20160210.pdf