As per thier own website, each "poll" is generated by a random survey of 1,000 people - not a great sample size but they're trying. However, the big sticker is that the people are interviewed at and selected from near two of the college campuses.
The Mount Caramel Campus and the York HIll Campus - both located in Hamden, CT
Hamden, CT is a "blue area" - HIllary Clinton beat Donald Trump there 69 to 28 in 2016. Democratic candidates receive four times as many votes as Republicans in most elections from 2016 to 2018.
Conneticut is also a blue state. Every government position (All Senators, all Congress people, Governor, Attorney General, Comptroller, etc) all the way down to the state assembly, of which there are 3 republicans in 20 seats there.
Sure seems like that isn't much of a "National" poll and probably why their numbers are so fucked.