She just started day care. I drop her off in the mornings and my husband picks her up later in the day. Could she be resentful because of this?
It's not unusual for babies and toddlers to have strong preferences for playing with one parent. Their preference usually has nothing to do with how each parent treats them. And then, usually quite abruptly, the child begins to express a strong preference for the other parent, shunning her former "favorite" -- there's no apparent reason for this. There's no rule that small kids are supposed to cling to Mom more than Dad.
I would recommend, if possible, that you alternate the drop-off and pick-up routine at day care, with you having as much of an opportunity to be the one who picks up your daughter as your husband. It's probably less practical for you to do this (since I'm sure that your husband picks her up rather than you because it's more practical for him to do so) but if you can at all manage it, give it a try. I would also like to see you and your husband play more together with your daughter. It might also make a difference if your husband showed you more physical affection in front of your daughter (although she may respond with some jealousy) and hugged you both at the same time. The both of you should share her bedtime rituals. I guarantee you that her current behavior toward you will pass -- don't take it personally. Do not show her that you are sad or angry with her when she turns away from you because you could be unwittingly be training her to do the same thing next time.
Lastly, you might want to look at how your husband relates to your daughter, seeing if there are particular things that he does that seem to make her happy. If he does anything that she particularly responds to, imitate him when you are with her and see how she reacts.