Treasury Secretary Jacob Lew is warning Russia that it could face tougher economic sanctions because of its actions in Ukraine but so far other economic powers are showing a reluctance to go as far as the United States. Lew delivered his warning Thursday to Russian Finance Minister Anton Siluanov, telling him that the Obama administration was willing to impose “additional significant sanctions” if Russia escalates the Ukraine situation. Treasury said in a statement that Lew described Russia’s annexation of Crimea as “illegal and illegitimate.” Lew met Siluanov in advance of talks between finance ministers and central bank presidents of the Group of Seven major economic powers and a broader Group of 20, which includes the traditional powers and emerging economies such as China, Brazil and India. Lew’s tough language did not find its way into a joint statement from the G-7, and there was no hint […]