WASHINGTON — Jubilant Republicans pushed on Tuesday to the verge of the most sweeping rewrite of the nation's tax laws in more than three decades, a deeply unpopular bill they insist Americans will learn to love when they see their paychecks in the new year. President Donald Trump cheered the lawmakers on, eager to claim his first major legislative victory.Perhaps emblematic of the stumbles along the way, there was one last hiccup. Speaker Paul Ryan, who has worked years toward the goal of revamping the tax code, gleefully pounded the gavel on the final House vote, but then it turned out it wasn't final after all.The Senate still expected to pass the legislation Tuesday night, but the plan to send it on to Trump for his signature had to be scrapped.