NEW YORK — Seen from Wall Street, the Trump presidency is going perfectly. Travel ban troubles? Whatever. Russian revelations? Meh. Staffing woes? Who cares. Stocks continue to shrug it all off and rocket to new highs on the promise of big tax cuts, infrastructure spending and mass deregulation. But analysts now caution that Trumphoria in the stock market could soon crash into a harsh Washington reality.Before even getting to tax reform — where there is little agreement on the way forward — Republicans have to figure out how to repeal and replace Obamacare, win confirmation for a Supreme Court justice and deal with Democrats eager to slam the brakes on anything and everything President Donald Trump tries to do.