As explained, most recently two days ago, the key reason Wall Street is concerned about the complications involving Obamacare’s “repeal and replace”, which now appears will be stuck in Congress for a long time following vocal opposition from various conservative groups and outside lobby interests, is that it will delay tax reform. As Goldman laid it out over the weekend, “if Republican leaders cannot send the President an ACA bill by April or May, they will face two politically unpalatable options.