It is fair to say that it is much easier for the US president to form and conduct foreign policy than domestic policy. One of the reasons for this fact is that in external affairs, the support of Congress is often not necessary, whereas, in internal affairs, it is necessary to wait for approval constantly.
To achieve success in domestic politics, you need big crises or a majority in Congress. The role of the president in international relations has a more decisive and valuable role; his authority and charisma allow him to conduct a foreign policy that meets national interests.
In addition, the head of state can initiate illegal actions that Congress will not be able to stop. This fact is not fundamentally hostile; this is the president’s advantage over the US Parliament. Firstly, the modern world is becoming increasingly dangerous and complex due to many Western and Eastern powers’ vast nuclear potential and resources.
Secondly, US citizens often have unanimity on foreign policy issues, which gives the president more approval for his actions. Thirdly, because of the unanimity in the public’s opinion, the president has greater freedom of his actions and makes him the people’s representative.
The leading political institutions of the United States are not competitive with the institution of the US presidency in foreign policy matters. Domestic policy in this regard is very complex and ambiguous; the president needs to constantly consult with Parliament and promote his initiatives, which is much easier to do in foreign affairs.