Brett Kavanaugh's nomination as a Supreme Court Justice
Conflict of interest
He has made is clear that he would prevent a sitting president from being subpoenaed. Given that this might happen to Trump, it's clearly a conflict of interest for Trump to nominate a justice who has publicly stated this view.
What are the pros and cons of a Kanavaugh confirmation to replace Justice Kennedy?
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He has shown willingness to defend the Constitution
He has clarified many times that he doesn't intend to write law, but rather to defend the constitution, which is exactly what a justice should do.