The Wall Street Journal reports today that Rep. Solomon Ortiz has been contacted by House investigators who are looking into the use of overseas travel stipends, according to lawmakers who were also contacted. This follows the newspaper's reporting in March that stipends had been used for unauthorized purposes, and that some lawmakers were apparently ignorant of the rules governing use of the money.

Congressional rules say the daily travel funds, called a per diem, must be spent on meals, cabs and other travel expenses. But when lawmakers travel, many of their meals and expenses are picked up by other people, such as foreign officials or U.S. ambassadors. That can leave lawmakers with leftover money. Lawmakers routinely keep the extra funds or spend it on gifts, shopping or to cover their spouses' travel expenses, according to dozens of current and former lawmakers.