US stock futures edged lower on Tuesday after President Trump announced the firing of Fed Governor Lisa Cook. Dow futures dipped 0.11%, S&P 500 fell 0.04%, and Nasdaq 100 was flat. Asian markets closed mostly lower. Stocks on watch include IBKR (+4% premarket on S&P 500 inclusion), TLN (+5%), PLTR (-0.6% after CEO stock sale), and earnings from Okta.