There’s actually nothing Congress can do. Obama has foound a way to rule by instructing the Justice Dept to NOT enforce the laws of the land. The only recourse for the people and for Congress is to elect another President, one who WILL enforce the laws, uphold the Constitution and his oath of office. [His oath of office is what he has violated]
If he has qualms about whether a law is constitutional, he can issue a statement, suspend enforcement, and ask the Supreme Court to review the issue; if they say it's OK then he continues his job of executing that law even if he doesn't like it.
A gratuitous refusal by the chief executive to execute established law, just as a matter of buying votes, and doing so by favoring active criminal behavior and the severe consequences thereof upon an already staggering economy, demands immediate impeachment for a host of reasons.
A president can be impeached for violtaing his oath to OUR Constitution, but it requires a legislature who are not also violating their oaths, which we do not have, sadly.
Wrong, there is plenty they can do. He has violated his oath of office by not upholding the laws of the land and is therefore subject to impeachment. Congress can do it, but they lack the fickin' guts to do so. At least one of them had the courage to file a lawsuit against Bozo for doing this illegal act.