It is the second round of sanctions by the United States in response to a botched attempt in March 2018 to fatally poison a former military intelligence officer.
The trickle of Democrats backing an impeachment inquiry is threatening to turn into a flood, but there are few signs the rising tide will sway House Democratic leaders.
Tonight’s lineup will feature 10 candidates including the former Vice President Joe Biden, Senator Kamala Harris of California and Senator Cory Booker of New Jersey.