"Hmm! Hmm?"
Tocqueville instinctively responded to Jerome Bonaparte, and then he realized that the President was going to deprive him of his power as Minister of Foreign Affairs to participate in German affairs!
If every president wantonly interferes in foreign affairs, then what is the need for a Minister of Foreign Affairs in the government? They might as well have the President also serve as Minister of Foreign Affairs.
Tocqueville showed a resistant expression, but he did not verbally oppose the President's decision. He wished to express his dissatisfaction through silent language.
Tocqueville's expression was thoroughly observed by Jerome Bonaparte.
In routine foreign affairs, of course, he would choose to respect the Minister of Foreign Affairs.
Even if Tocqueville himself lacks the capability to handle the complexities of foreign affairs, to maintain internal harmony, he would choose to respect the administrative power of the minister.