As Rick Wilson points out, the damage to the standing of the US is done. This is going to translate into a reduced role for the US and a discounting of US actions or statements in the future. Even when Trump is gone, and a friendly, likely Democrat, president supportive of NATO in in power, they will only look at the short term benefits. Because they know that the next election could put in someone like Trump. What they get for the next few months, or at most a couple of years, will be the expected benefit to balance against the cost, which can be for decades.