Juan Williams: McConnell teeters on the high wire

How long can Mitch McConnell stay up on that high wire? 

On his right, the Senate Minority Leader is juggling the prospect of another Trump campaign and a party bent on intensifying divisive social issues.

To his left, he is trying to get a grip on center-right suburban voters to regain his balance. But the suburbanites are running away, repulsed by the culture wars that excite his party’s base.  

McCon...