It's been one bummer of a week, and it's little more than half over. While we don't know what Trump discussed with his boss on Monday, there are some suggestive hints... Trump's bizarre statement about Montenegro's people being aggressive, and the possibility of them starting World War Three, is troublesome, considering that Montenegro joined NATO last year. Putin probably backed an attempted coup in Montenegro in 2016. Trump's statement about Montenegro signals that the United States can no longer be trusted to honor the obligations encoded by its alliances... to me, it looks like NATO is functionally done.
Just as worrisome is Trump's refusal to rule out handing former ambassador Michael McFaul to the tender mercies of Putin's inquisitors. This is a clear signal to anyone in the diplomatic corps that diplomatic immunity is now a farce. It also signals that the US Government doesn't take seriously its obligation to protect United States citizens from autocratic regimes with which the US doesn't even have an extradition treaty. McFaul may be Putin's enemy, but he's no enemy of the American people.
Mere discussion of violating treaties and extraditing American citizens to hostile foreign powers is an unacceptable subversion of the norms by which civilized societies work. If this doesn't spur Congress to initiate impeachment proceedings, then this downward spiral into autocracy will ramp up.