aid. as the witnesses have testified, ukraine needs our support to defend itself against russia. i heard directly from witnesses who important the visit and aid were, particularly from ambassador taylor. >> these weapons and this assistance allows the ukrainian military to deter further incursions by the russians against ukrainian territory. if that further incursion, further aggression, were to take blase, more ukrainians would die. >> professor karlan, does the president's decision to withhold from ukraine such important official acts, a white house visit and military aid in order to pressure president zelensky relate to the framers concerns about abuse of power and entanglements with foreign nations. >> it relates to the abuse of power. the entanglements with foreign