There are First Mortgages and Second Mortgages, the former designed to allow you to purchase the home or totally refinance the original loan; the latter, also known as a Home Equity Loan, allows you to use your available equity to take out a subordinate loan in addition to your First Mortgage.
Many powers belonging to the federal government are shared by state governments. Such powers are called concurrent powers. These include the power to tax, spend, and borrow money. State governments operate their own judicial systems, charter corporations, provide public education, and regulate property rights.
The Federal Government shares control of the United Sates with individual U.S. State governments. State governments are made up of their own legislative, judicial and executive branches and are given a fair share of autonomy to create laws for their individual states, although federal law holds precedence.