Speaker of the U.S. House of Representatives John Boehner's press office posted a signed copy of the letter at www.speaker.gov.
The letter was signed by eight Republicans and three Democrats.
The bipartisan group of House leaders and committee chairs calls on Obama to decide on lethal aid for Ukraine.
"In the wake of a cease-fire agreement that appears only to have consolidated Russian and separatist gains since the first Minsk agreement, and in anticipation of the near certainty that Russia and its separatist proxies continue their efforts to destabilize Ukraine and seize additional territory, we urge you to quickly approve additional efforts to support Ukraine's efforts to defend its sovereign territory, including through the transfer of lethal, defensive weapons systems to the Ukrainian military," the letter addressed to Obama reads.
The letter also notes that Congress has already, with overwhelming bipartisan support, provided Obama with "the authorities, resources, and political support to provide assistance, including lethal, to the government and people of Ukraine."
"We should not wait until Russian troops and their separatist proxies take Mariupol or Kharkiv before we act to bolster the Ukrainian government's ability to deter and defend against further aggression," the U.S. lawmakers stress.
