US equity markets retreated for a second session to near 3-week lows as uncertainty around tax reform continued to weigh on investors' minds - Dow fell -138-points or -0.59% (having traded down as much as -166-points earlier in the session, with Caterpillar the biggest drag on the index). The broader S&P500 fell -0.55%, with the financial, consumer discretionary and energy sectors leading the weakness) NASDAQ -0.47%. Wisconsin senator Ron Johnson became the first Republican senator to voice his opposition to the Senate tax plan as currently written. US Senate Republicans on Tuesday linked repealing a key component of Obamacare to their ambitious tax-cut plan, raising new political risks and uncertainties for the tax measure that financial markets have been monitoring closely for months.
