President Joe Biden (D) and Ukraine’s President Volodymyr Zelenskyy had a phone call Saturday. Over the course of the call, Zelenskyy invited Biden to travel to Ukraine’s capital Kyiv, according to the Ukrainian description of the call. Zelenskyy

invited him [Biden] to visit Ukraine: “I am convinced that your arrival in Kyiv in the coming days, which are crucial for stabilizing the situation, will be a powerful signal and contribute to de-escalation.”

It’s telling that

[t]he White House statement on the call with Zelenskyy does not mention the invitation to Kyiv.

Why is Biden so reluctant to accept the invitation? Or is he ducking away from the challenge?