On Monday, Mr. Spicer said that Mr. Trump remained under audit<br />and that, breaking with 40 years of presidential tradition, his tax returns would not be made public.<br />The Trump administration’s tax plan, promised in February, has yet to materialize; a House Republican plan has bogged down, taking as much fire from conservatives as liberals; and on Monday, Treasury Secretary Steven Mnuchin told The Financial Times<br />that the administration’s goal of getting a tax plan signed by August was “not realistic at this point.”<br />A tax overhaul could be the next expansive Trump campaign promise that falters before it even gathered much steam.<br />“If they have no plan, they can’t negotiate,” said Larry Kudlow, the economist who helped Mr. Trump devise his campaign tax plan.<br />Polls show that a majority of Americans, including most Republicans, would like Mr.<br />Trump to release his tax returns, according to the Republican pollster Frank Luntz.<br />Trump’s Unreleased Taxes Threaten Yet Another Campaign Promise -<br />By ALAN RAPPEPORTAPRIL 17, 2017<br />WASHINGTON — President Trump’s promise to enact a sweeping overhaul of the tax code is in serious jeopardy nearly 100 days into his tenure,<br />and his refusal to release his own tax returns is emerging as a central hurdle to another faltering campaign promise.<br />While Mr. Trump signaled that he would like to reach a bipartisan tax deal, potentially including an infrastructure<br />plan, the focus on his tax returns suggests that any legislation will happen along party lines.