Four candidates are currently vying for the top spot in next month’s Iowa caucuses – Biden (24%), Sanders (18%), Buttigieg (17%), and Warren (15%). Compared with Monmouth’s November poll, Biden has gained 5 points (up from 19%) and Sanders has gained 5 points (up from 13%), while Buttigieg has lost 5 points (down from 22%) and Warren has declined by 3 points (down from 18%). Klobuchar is knocking on the door of the top tier with 8% support in the current poll (up from 5% in November).

Most of the demographic shifts since November are within the poll’s margin of error, but there was a particularly notable swing among voters age 65 and older away from Buttigieg (11% now, 26% in November) and toward Biden (44% now, 29% in November). Klobuchar has also gained support among these older voters (13% now, 5% in November).

“A plurality of older voters line up behind Biden, but others in that age group seem to be looking for a fresher face. They appear to be split between Buttigieg and Klobuchar right now,” said Patrick Murray, director of the independent Monmouth University Polling Institute.