The U.S. Senate was in session on September 15th, 2025, as investigations into the assassination of Charlie Kirk continued, with a Washington Post report revealing the suspect, Tyler Robinson, allegedly confessed on Discord. Separately, Representative Tom Suozzi stated he would not endorse "Mamdani," disagreeing with his proposed solutions and viewing socialism as a failed ideology. The Senate session was broadcast live on C-SPAN2. Suozzi's comments, made via X (formerly Twitter) at an unspecified time on September 15th, indicated a fundamental disagreement with "Mamdani's" approach to affordability, citing socialism's historical failures. He also noted he had not discussed Governor Newsom's decisions with her and was not in a position to offer political advice, referencing their past electoral contest. Meanwhile, a Washington Post report, highlighted by Phil Lewis on X, detailed that the suspect in Charlie Kirk's assassination, Tyler Robinson, reportedly confessed to the crime on the Discord platform. This development follows earlier commentary from Geraldo Rivera suggesting the motive might stem from fantasy role-play games rather than political discord. In broader political discourse, Senator Chris Murphy stated on September 15th that President Trump and his allies might "exploit this tragedy" to target political opposition. These remarks were made at the Anti-Monopoly Summit. Stephen Miller, a friend of Kirk's, expressed deep personal grief, calling Kirk a "treasured friend." Arnold Schwarzenegger is also expected to address Newsom's redistricting campaign on September 15th, according to Politico. Earlier, President Donald Trump met with Ecumenical Patriarch Bartholomew in the Oval Office to discuss global humanitarian issues and religious diplomacy. Vice President JD Vance shared a message emphasizing truth and unity, reciting Psalm 133. The National Republican Congressional Committee (NRCC) continued its ad campaign targeting House Democrats over an upcoming budget vote, with Representative Marjorie Taylor Greene criticizing the Continuing Resolution for funding "TRANSGENDER POLICIES, NOT our own Trump policy budget."