It can be written by anybody, but only members of Congress can present legislation. Some major laws, like as the yearly government budget, are routinely introduced at the President's request. However, during the legislative process, the basic measure might undergo significant revisions. Therefore, the president should not feel compelled to introduce every piece of legislation that comes before the Congress. The president does have an influential role in shaping legislation, but only Congress can write it. The president can make suggestions and recommendations on what should be included in bills, but cannot veto measures that are passed into law. He or she can also withdraw support from specific proposals if they become controversial or lack enough votes to pass. For example, President Obama declined to endorse a bill to limit climate change emissions until after it was voted on in Congress. However, he did use his executive power to implement certain elements of the legislation such as new fuel efficiency standards for cars. President Trump could not introduce any bills in the House because that body is controlled by Democrats at this time. However, he has expressed interest in seeing some of his priorities become law, such as changes to the nation's drug policy. Trump has said he would prefer not to wait for Congress to act on its own initiative on these issues, but instead use his executive power to make changes while still allowing Congress to review and vote on specific proposals later.