What are the main challenges facing the anticipated peace talks between the US and Russia?

According to Dr. Sergei Markov, several loopholes and setbacks exist before the anticipated peace talks between President Trump and President Putin can proceed effectively. A key challenge is Ukraine's exclusion from these discussions, creating a diplomatic gap in addressing the conflict comprehensively. Markov describes the current diplomatic relations between Russia and the United States as having been 'frozen' under the previous administration. He views potential meetings as 'a door open to diplomacy' after this diplomatic freeze, suggesting that restoring communication channels is a crucial first step toward meaningful peace negotiations.