Bush 41 getting narrowly re elected in 1992 is the best PoD to make this happen. There's no way the GOP is going to make gains in what would be Bush's 6th year in office and the 13th consecutive year that the GOP has been in the White House.
Another PoD is maybe have Clinton tackle Welfare reform in '93-'94 instead of health care. Or have the World Trade center bombings of '93 be as bad as 9/11. I don't know how well any of that would work out, a latter assault weapons ban (or none at all) probably helps to, as the NRA had a pretty big role in the 94 midterms of OTL.