WASHINGTON — The United States and Mexico are expected to release text of a bipartisan trade deal that the two countries reached last month, setting up a potential showdown with Canada and Congress over the future of the North American Free Trade Agreement.The Mexican government is planning to publish the agreement by 7 p.m. on Friday, according to a Mexican government official, and the United States trade representative is also expected to release the text. The bilateral agreement, which does not include Canada, would replace the 25-year old Nafta pact, which has stitched together . . .