Advocates say by putting child care on the back burner, even briefly, Biden is sending a message about his priorities, suggesting that the needs of women and families are less pressing than other items on the administration’s agenda. The delay could mean less money for the caregiving portion of the bill, they say. If Biden and the Democrats expend all their political capital on the first portion, persuading Congress to approve an already high price tag, they may struggle to push through ambitious policies on child care.