As long as Alex Trebek is able to host I would hope most stations if not all would avoid pre-empting it if possible. So far he has shown no signs of problems. He just keeps on doing his superior job.
I know not everyone has cable channels, especially with cord cutting, but during Watergate we didn't have such options.
Stations generally already do avoid pre-empting Jeopardy! compared to Wheel of Fortune and other syndies. Usually if a station does pre-empt Jeopardy!, Wheel is pre-empted along with it, or it's something uncontrollable, like breaking news or all-day sports coverage (e.g. Christmas NBA on ABC). A lot of stations will air random local specials in Wheel's time slot but leave Jeopardy! alone, even if it airs in prime access. And often, if both shows are pre-empted, J! will either get a more favorable make-good time than Wheel, or Wheel doesn't get a make-good at all (e.g. Every year during March Madness, WTSP Tampa re-airs the Thursday and Friday eps of J! early weekend mornings, but doesn't air the Wheel eps at all). It is very rare to see Jeopardy! pre-empted but not Wheel. It's almost-always either just Wheel, or both of them.
J! doesn't pre-empted nearly as often as Wheel since stations love putting Wheel in the 7:30 ET/6:30 CT slot where stations and networks love to air local specials, pregame shows, and award show red carpets. Case in point, with Thursday Night Football and the World Series, Jeopardy! is only bumped to late-night slots on two affiliates: KVHP Lake Charles and KDVR Denver. Wheel of Fortune is bumped late by five affiliates (not counting KHON Hawaii which bumps it to the still-reasonable 8:00 time slot): KDVR Denver, WBFF Baltimore, WVUE New Orleans, WDAF Kansas City, and WALA Mobile.
Jeopardy! already gets a bias from most stations, not just because of Alex's health, but because it surpassed Wheel in ratings a couple years ago, and also because it has continuity with its returning champions (which Wheel hasn't had since the 90's). Most stations will not pre-empt it if they don't have to. Even WBZ Boston, which pre-empts J! and Wheel every Friday during football season, airs J! tourney finales (which almost-always fall on Fridays) on its sister station WSBK as well as overnight on WBZ, but Wheel only gets the latter. Also, sometimes WBZ will air some local event in the 7:30 slot, and J! gets moved to 7:00 and bumps Wheel overnight.
With the impeachment hearings, I won't be surprised if some Central Time Zone affiliates are forced to pre-empt Jeopardy!, then announce later that day that the show will air at 6:30 in place of Wheel. WMBD Peoria (CBS) did that back in May when J! was pre-empted by severe weather coverage.
All I'm saying is, Jeopardy! viewers have it way easier than Wheel viewers. Wheel is very likely the most pre-empted syndicated program on TV because of its prime access mandate and "self-containedness" of each episode, therefore being "unimportant". Entertainment Tonight is probably a close second.