IA-Quinnipiac: Warren 20 Buttigieg 19 Sanders 17 Biden 15 Klobuchar 5 Harris 4

[Pollster]

If Biden continues this downward trend, he's at risk of not netting any delegates out of Iowa.

Still a bit too soon to tell if Pete and Bernie's current highs will decline like their past ones have, or if they are going to ride them to the end this time. It is certainly clear, though, that this race has taken a new and much tighter shape.

[Pollster]

Another interesting finding in this poll is that Warren has quite possibly hit her ceiling. Among candidates with less than 15% support, she is the second choice of only 6%. She is the second choice of 39% of Sanders voters and 28% of Pete voters, so her best bet at the moment is the race reverting back to a Biden vs. Warren head to head.