As part of a comprehensive system of support for families with young children, home visiting programs help to ensure that families facing obstacles--such as those caused by stress, language barriers, geographic and social isolation, and poverty--receive the support they need to nurture their child's healthy development. Efforts to support home visiting programs continue to grow in states and communities, and a significant opportunity exists at the federal level to significantly expand home visiting programs. This opportunity presents a complex policy challenge, and professionals in the infant-family field have a critical role to play in helping policymakers understand the needs of infants, toddlers, and their families as they work to expand home visiting programs.