The big banks were one of the top donors to Obama's 2008 campaign. The fact that none of the banks were prosecuted or even held accountable for the crisis raises big questions how much the campaign funding influenced the way the bailout was structured. It also doesn't help Obama that he was famous for going after private funding after backtracking on his pledge not to do so.
Bush's story is similar but with energy companies the most famous being Halliburton who funded his election campaign and turned out to be the biggest beneficiaries to profit from the Iraq war. It probably wouldn't have upset people as much had it not been that the Bush family had close ties to this company and where Dick Cheney also happened to be the CEO. It was a big scandal at that time you can go read back on, but as is with many of these scandals everything seems to be forgotten or forgiven with time. I wouldn't be surprised if it's the same with Trump 20 years from now.