What are the potential consequences if Putin doesn't engage in good faith peace negotiations regarding Ukraine?

According to US Vice President JD Vance, if Putin fails to negotiate a Ukraine peace deal in good faith, Washington is prepared to escalate its response significantly. The potential consequences include imposing tougher sanctions on Moscow and the possibility of deploying US troops to Ukraine. Vance emphasizes that Europe should play an integral role in any Ukraine peace negotiations, highlighting the international dimension of resolving this conflict. Meanwhile, Russia continues its military offensive, recently claiming to have captured two additional villages in eastern Ukraine, which adds urgency to the diplomatic efforts. This situation reflects growing concerns in Kyiv and Europe about potentially being marginalized in direct talks between Vladimir Putin and Donald Trump to end the war, underscoring the complex geopolitical dynamics at play.