Presidents cannot make new laws on their own.
DACA is illegal.
DAPA is illegal.
Presidents can’t shield fraudulently documented foreigners from our laws against fraudulently documented foreigners.
Presidents who do such should be impeached.
DACA and DAPA (should it come into force) don’t just shield millions of illegal alien invaders from deportation. They are also come with work permits. In effect they are green cards. DACA “dreamers” can also get US travel documents so they can go back to visit the family in the El Salvador to encourage more illegals to come up north to enjoy U.S. largesse. Also, DACA illegals are likely counted as “legally present” for state and local welfare and subsidy programs. And, of course, schools and colleges consider DACA as legal for enrollment (not they care if students are totally illegal).
In short DACA and DAPA are hugely signifiant government actions in term of scope and depth. IE they are the sort of government action that should be enacted via legislation, as law, not via the fiat order of a lame duck President.