Russian Connection

"We do know that Trump has mouthed every Kremlin position (e.g. denying that Russia had invaded Ukraine, pretending that hacks of his political opponents had not been linked to Russia, questioning the resolve of NATO). He also has surrounded himself with pro-Russian advisers and surrogates. In other words, we know his judgment is compromised; we just don’t know how or why, in part because he still refuses to turn over his tax returns that might show a Russian connection."

https://www.washingtonpost.com/2016/11/01/trumps-putin-problem-returns-in-a-big-way