sentences:  Donald (Michael Benjamin Washington) is an entrepreneur who pretends to be Tracy Jordan's son (despite being two years older than Tracy).His money-making ideas consist of questionable business practices, such as picking out corporate names already in use (a frozen-yogurt and microbrewery restaurant called Microsoft, and a phone service for nationwide air-quality updates called American Airlines).Tracy knows Donald is not his son; he supports his misguided ideas anyway, and Jack (who had convinced Tracy to cut Donald off) later tells Tracy to keep being a dad.