( JTA ) — Rep. Henry Cuellar, one of the most conservative Democrats in Congress, declared victory over a progressive in a key Texas Democratic primary that involved nearly $2 million in funds from the AIPAC pro-Israel lobby. Cuellar’s margin late Tuesday, at 177 votes when all votes were counted, was razor-thin and his opponent, immigration lawyer Jessica Cisneros, was not yet conceding. If Cuellar prevails, it would vindicate for a second time in a week the political action committees affiliated with the pro-Israel powerhouse that have poured millions into elections this year to shore up Israel-sympathetic Democrats. While Cuellar...