Give an Example, and the Constitutional Checks, when the Head of Government carries out the Role: Legislative

-Trump suggested the Border Wall with Mexico several times in his Union Address. Biden in 2023 advocated for Lower Healthcare Costs and Tackling the Climate Crisis. Alongside, the president's Veto -Congress can Overturn the Presidential Vetos, such as Obama's Veto on the Justice Against the Sponsors of Terrorism Act. Congress must also Introduce and Pass Legislation BEFORE the President can Sign or Veto it. This can be why Trump found it so hard to get his Mexico Border Wall.