Senator Tim Kaine has repeatedly sought to limit presidential war powers, especially during Donald Trump's time in office, but has faced criticism for not applying the same scrutiny to presidents from his own party. Kaine maintains that Congress should have a stronger role in authorizing military action, and has introduced or supported several resolutions aimed at curbing Trump's authority. However, Republicans argue that his efforts are politically motivated, noting the absence of similar actions during Barack Obama's presidency and Kaine's rejection of Republican-led resolutions under Joe Biden.

Kaine defends his approach by distinguishing between military hostilities and humanitarian actions, such as building a pier for aid in Gaza, which he does not consider grounds for war powers intervention. Despite pushback from Republicans, who claim his resolutions are merely symbolic and unnecessary without active military engagement, Kaine remains committed to filing further measures to challenge the president's war authority. The ongoing debate highlights partisan divisions over congressional oversight of military decisions.