Ex-Texas National Youth Administration head and newly minted congressional candidate Lyndon Johnson • TX-10: Here's a major surprise: Emma Nicholson Buchanan, the widow of deceased Rep. James Buchanan, has announced that she will not run in the upcoming special election to succeed her husband. Buchanan was probably the only candidate who could have cleared the field, and her decision means that we're in for a wide-open contest in this Austin-area seat.