WASHINGTON — U.S. Rep. Henry Cuellar, D-Laredo, is facing charges of bribery, money laundering and working on behalf of a foreign government. U.S. Rep. Veronica Escobar, D-El Paso, also called for Menendez to step down last September, but she is barred from discussing the Cuellar case due to her seat on the House Ethics Committee. “The substance of the allegations …