Obama is expected to sign the bill this week, the Associated Press has reported.

The bill authorizes the president to provide weapons to Ukraine and introduce a new package of sanctions against Russia because of its aggression in Ukraine.

According to the spokesperson, Obama continues to be concerned about the bill, but said that the legislation still gives him the necessary flexibility.

The bill gives the president the authority to provide lethal and nonlethal military assistance to Ukraine, including anti-tank weapons, counter-artillery radar and tactical surveillance drones, and authorizes $350 million over two years to cover the cost, AP reported.