Foreign policy: James I pursued a policy of peace with Spain, which was unpopular with many in Parliament who wanted a more aggressive approach to the Spanish threat.
Financial issues: James I inherited a large debt from his predecessor, Queen Elizabeth I, and he struggled to balance the budget. He imposed new taxes and fees, which angered many in Parliament.
Constitutional issues: James I believed in the absolute power of the monarchy, while Parliament sought to assert its own authority. They disagreed over the scope of the king's prerogative, the role of Parliament in law-making, and the independence of the judiciary.