Tough question to answer, David, as we all have differing opinions as to what constitutes a small and large difference of opinion, where to draw one's personal "red line", but I get your point. Where is that tipping point between putting aside relatively insignificant views and policy differences, given the priority of finding common ground and working/voting together,  as opposed to harshly responding "No thanks, I'm not going to do business with you...ever! And don't let the big tent flap hit your sizable ass on the way out!" ? The number of possible landmines, some relatively inconsequential, and others enormous. These latter disagreements are potentially values-laden, trust-breaking, and coalition-shattering. And the red lines are bound to shift over time. Here are just a few potential issues that I came up with.

I won't make common cause with anyone who would reverse the protections afforded to the LGBTQ community from the Bostock Decision though I believe those with thoughtful, informed and often differing views related to medical treatments for minors should be heard, with the matter being debated, and with eyes open as new scientific insights are discovered.  

I would banish the chanters of "From The River To The Sea" though those who voice concern for the tens of thousands of civilian deaths, and the necessity of aid for those returning to Gaza belong. And to be clear, anyone voicing support for the Hamas death cult  is out on their ass!

I wouldn't want to share space with xenophobic racists who seek to totally eliminate immigration, but am happy to include those with ideas related to humane border control and legal immigration. 

I have always been pro-choice but believe that the pro-life side should be heard (not that many would flee Trump anyway).

In those relatively simple years, before bizarro world engulfed us, I would never have considered entering the big tent and breaking bread with the Bush family,  much less the Cheneys. I'm still mindful of the substantive divisions we had when they were in power. But times have changed and in general, we must offer a welcoming hand to those Republicans who proclaimed themselves to be Never Trumpers.

Still, upon exiting our big tent soiree, I'll certainly listen for the clanking of any silverware that a few of our new allies may have "forgotten" to return to the table. My old habit of distrusting some of our new friends is ingrained. I mean, this new banding together thing, this new trust,  has its limits.

Peter T.