Former President Donald Trump attended a Houston lunch to seek more campaign contributions from oil executives, followed by a $100,000 per person fundraiser in Dallas. Top Democrats are calling for investigations into alleged promises made by Trump to Big Oil in exchange for donations. Senate panels have launched probes into reported 'quid pro quo' deals between Trump and energy executives, with Democrats demanding accountability from Big Oil for high prices at the pump. Trump raised $40 million from oil industry donors in Texas, promising to approve their projects and expand drilling.