On Kavanaugh

The first two allegations were, while weak due a lack of corroborating evidence and the fact that all direct witnesses have categorically denied the existence of the events in questions (and in one case denied knowing Kavanaugh at all), at least somewhat plausible. There was a chance that such an event could have evaded the notice of the many background investigations that have been run of Kavanaugh, as unlikely as it seems. This most recent one though, accusing him of attending gang rape parties?
Brett Kavanaugh has undergone six background investigations. At least one of these was an SSBI (Single Scope Background Investigation, done for all clearances above "Secret").
This isn't some "Hey we checked a database and you don't have a criminal record". This is a "We went and talked to your old next door neighbor. And your friends growing up. And your mom. And that girl you kissed in the fifth grade. And the dude you bullied in the second grade. And your father's brother's nephew's cousin's former roommate. And he said you did weed in the sixth grade, so you don't get a clearance."
The chances that an SSBI would miss Gang Rape parties is beyond ludicrous, to the point where if the accusation is true, we've got bigger problems than who the next SCOTUS justice is.

SCOTUS, one of the most effective Checks on the Executive

On Monday, Mr. Trump announced his pick for SCOTUS to fill Justice Kennedy's seat, with Judge Brett Kavanaugh. At this point, assuming that Judge Kavanaugh gets seated (which he likely will), the Trump Presidency, despite some truly bad decisions on the part of the Executive, will be an overall win. Now, I'm still rather displeased with the president on several issues, and I'm not planning on voting for him, but most of his less exemplary decisions are entirely executive in nature, meaning that they only last as long as an executive wants them to. The judiciary on the other hand, can be shaped for a generation, and so far, his picks have been solid. Moreover, his one seated pick so far, Gorsuch, has already once ruled in ways that limit  the Trump administration. A good SCOTUS is a major limiter on executive shenanigans, and so far Trump has strengthened, rather than weakened, that limiter.
Just don't expect me to be happy when SCOTUS has to remind the executive branch that the Constitution, not the personal beliefs of the executive or of the bureaucrats involved, is the supreme law of the land.