HOUSTON (AP) — Rep. Christian Menefee of Texas, the newest member of Congress , started the job Monday – and now has just four weeks to convince Houston voters he already deserves reelection. The candidate Menefee defeated on Saturday, Amanda Edwards, also is running again for the 18th District seat in next month’s Democratic primary. So is Rep. Al Green, who for decades represented a district nearby but now finds himself living in a newly drawn 18th. The back-to-back elections are among the