What keeps you up at night? Msnbc.com’s Gut Check America series asks you, our readers, to tell us what matters most to you and how it affects you, your loved ones and neighbors. Then we use your responses to help inform our coverage of the topic.

Foreclosure fallout hits communities hard

Multiracial in America: The colors of change

Economy: The ‘middle-class squeeze’

War's impact falls hard on relative few

Health care: When living means bankruptcy

Illegal immigration: Turmoil in Tulsa