In Syria, at least eight people were killed in a bombing in the northeastern city of Tel Abyad. No one has claimed responsibility so far. Turkish troops seized the city from Syrian Kurdish fighters last month, following President Trump’s decision to withdraw U.S. military support for the Kurds, clearing the way for the Turkish offensive. Turkish President Recep Tayyip Erdogan is planning to visit President Trump at the White House on Wednesday — the same day televised impeachment hearings begin investigating whether President Trump withheld military aid from Ukraine in order to pressure the Ukrainian president to investigate Trump’s political rival Joe Biden and his son. The first two witnesses will be William Taylor, the top American diplomat in Ukraine, and George Kent, a senior State Department official.