Russia appeared to brush aside President Donald Trump’s threat to impose tariffs against Moscow and its trading partners if its war with Ukraine does not end in 50 days, but there are signs of growing concern among some factions of the nation’s elite that an opportunity may have been missed.

President Vladimir Putin intends to keep fighting in Ukraine until the West engages on his terms for peace, unfazed by Donald Trump's threats of tougher sanctions, and his territorial demands may widen as Russian forces advance,