How does the executive branch of the U.S. government check the other two branches of the government?

Our Founding Fathers created the United States government to function within three branches: legislative, judicial and executive. This design set up a checks and balances system to make sure one branch did not become more powerful than the others. There are checks and balances in place to allow the executive branch to limit the legislative and judicial branch, just as they can limit the president. 
Although the legislative branch is responsible for creating laws, the president can veto the laws. To override the veto, the legislative branch must obtain an even higher number of votes. The executive branch may also declare Executive Orders without Congressional approval. However, an Executive Order might be declared unconstitutional by the judicial branch. The executive branch of government checks the judicial branch by nominating Supreme Court judges. The U.S. constitution was written with these checks and balances to avoid one person or group of people from dominating the decisions made within our country.