I suppose that would be dereliction of duty and malfeasance in office.
veto
For a bill to become a law, the president must sign it. When the president refuses, it's cal the power of "veto." Otherwise congress must overrule the veto with an 2/3 majority vote.
If the President vetoes a bill and refuses to sign it into law, the Congress can override his veto with a 2/3 majority vote in each house of Congress.
if the president vetos (or refuses to sign a bill) 2/3 of the senate can over ride it.
When the president signs the bill, it becomes law. If the president refuses, the bill is vetoed, but if a two thirds vote by Congress, it can still become law.
The president proposes several new bills that are all rejected by Congress.
The US President can certainly make a draft of a law he would like to see the Congress to pass. A quick example is this: the president wants a bill created to allocate $100,000,000 for a mars exploration project. As this is a "money" bill, he could give the draft to a member of the House of Representatives. He can also make it clear that the bill is a priority. He cannot do anything more then that. He cannot make "legislation". If the bill passes the House & is approved by the Senate, then the President can sign the bill into law.
The president can use executive orders to enact policies congress refuses to pass as laws
He cannot. The president can veto the bill, returning it to Congress without his signature. Congress can override the President's veto by a two-thirds vote of both the House and the Senate. If the Congress overrides the President's veto, it becomes law even if he doesn't like it. If the President refuses to enforce the law, he is violating his Constitutional oath to ensure that the laws will be faithfully executed, which would be an impeachable offense. Congress could then "fire" the President by removing him from office.
If a majority of Congress does not want the bill, then the bill is dead unless the committee makes changes that allows the bill to get 50%. Then it goes to the President for his signature. If the president refuses to sign, it goes back to congress. If enough members of Congress want the bill, they can override it with a two-thirds vote.
If the President of the United States refuses to sign a bill into law, he vetos it and returns it to the Congress. The Congress can, by 2/3 vote of both the House of Representatives AND the Senate, override the President's veto, and the law goes into effect without the President's approval.
All vetoes are done the same way. The president refuses to approve the bill and sends it back to Congress with his objections. They can either change the bill to remove the president's objections or pass the original bill with a two-thirds favorable vote in both houses of Congress.