He wants to clip Trump's war power. - They don't know what the justification for the war is, says the senator.
Senator Tim Kaine expresses disappointment over the Trump administration’s justifications for its actions in Iran and proposes a measure to limit presidential war powers.
US Congress to debate Trump’s war powers
The US Congress plans to vote on measures that could limit President Trump's war powers regarding Iran, although the Republican majority may protect him.
SEN TIM KAINE: Trump's Venezuela strike trampled Congress' war powers. Congress must stop it
Senator Tim Kaine criticizes President Trump's unauthorized military actions in Venezuela, arguing that they undermine Congress's authority and reflect a troubling history of US intervention in Latin America.