. >> sarah chayes learned about corruption the hard way living for a decade in afghanistan where sherty officials, a risky thing for an american woman to be doing. >> he is using his governmental power to protect that monopoly. >> reporter: now she's brought that experience back to the u.s. where she often provides expert testimony to congressional hearings. and now, a court case in which the president himself is a defendant. >> the president of the united states is receiving money, fees, just a good of items of value from a variety of different foreign governments without ever having consulted congress or congress ever having made a statement whether that's legal or not. >> according to a watchdog group is a violation of the foreign emoluments close of the constitution stating no person of office of profit or trust shall without the consent of congress accept any present emolument office or title of any office from any king, prince or foreign state. the wording is quaint but chayes believes it's a modern-day application. >> if you choose to shoulder the honor of serving the people o

chayes says whatever the outcome, speaking out is what counts here. >> we are americans.emand any less of our government than south koreans are demanding of theirs? we don't get a democracy because god handed it down, we get it because we demand it and insist on it. i'm really struck at how passive, frankly, the american people seem to be at the moment when our very system of government is in danger. >> when you hear sober, thoughtful people start talking about our system of government being in danger p, i ap time to start paying attention. you're watching "on assignment" panama city, stay with us. (chris) the very first time i met bruce i saw on his lapel he's got a purple heart. (bruce) we started talking about the service. i outrank him. (chris) [laughs] yeah. meals on wheels reaches so many people. it's impactful beyond anything i've ever done in my life. (bruce) the meals and his friendship really mean, means a lot to me. (vo) through the subaru share the love event, we've helped deliver over one-point- seven million meals to those in need. get a new subaru and we'll