David Gergen : Obama is experiencing another low point in his presidency . Comment: Gergen : A second-term president still can be a strong leader , particularly overseas . Or Ukraine ? He says Obama should n't diminish the potential impact of his decisions .
David Gergen : Obama is experiencing another low point in his presidency . Comment: Gergen : A second-term president still can be a strong leader , particularly overseas . He says Obama should n't diminish the potential impact of his decisions .