Jim Geraghty of National Review and Greg Corombos of Radio America welcome a new poll showing nearly half of Americans hold a positive view of the Republican tax bill and are bullish on the economy, although they are not ready to give Trump and the GOP credit.  They also wince as Democrats win a usually safe Republican seat in the Wisconsin State Senate, and Gov. Scott Walker urges GOP members and activists to make sure people know about their significant accomplishments.  And they sigh as President Trump's doctor gives the commander-in-chief a clean bill of health, but White House reporters still ask the physician a litany of repetitive questions about Trump's mental health and whether he he is fit to serve under the conditions of the 25th Amendment.