Glenn, he held back military assistance to Ukraine to force a political favor against Biden. He twice ordered the withdrawal of US forces from Syria, ceding territory to Russia & Iran. He refused to blame or call out Russia for 2016 election interference, Navalny poisoning 1/ https://twitter.com/ggreenwald/status/1340458170838364168
2/ ..arms to Taliban or now this enormous cyber attack. congress had to force bim to enforce sanctions against Russia via veto-proof majorities. Otherwise, superb point.
3/ Undermining NATO alliance, withdrawing troops from Germany, and questioning mutual defense provisions of NATO are also all gifts to Putin and the Kremlin.
4/ Finally, his outreach was meant to achieve a grand agreement on nukes. In reality, intermediate nuclear arms treaty expired with no current plan for the way forward. Nuclear agreements have backtracked, not advanced.