The best situation would probable to put Tom Kean Sr. In as a temporary replacement. Tom Kean Jr. to run in October. Most voters would know the difference and just vote for the familiar name.
Doesn’t that accentuate the incestuous nature of modern politics—and diminish the stature of Jr.?
That’s how we got Sen. Mark Warner. He played off the name of then-incumbent Sen. John Warner. He is a billionaire so $ didn’t mean anything in building his name ID. He ran for the Senate against former Sen. John Warner, knowing he didn’t have a prayer to be elected, but used that name ID the race established to run for gov, where he spent the single term allowed, then ran for the Senate when John retired. Excellent strategery.
It’s also how PA got Sen. Casey. In the latter case, he played off his dad’s name.