More than two weeks since the Jan. 6 insurrection at the Capitol, Washington is starting to feel a little less like a city under siege, as barriers come down, streets reopen, and the country’s new leaders start the work of assessing the damage from the calamitous final weeks of Donald Trump’s presidency. As I walked to the White House on Friday — President Joe Biden’s second full day in office — signs of the democratic crisis we all just lived through weren’t entirely gone.