“The opposite for courage is not cowardice, it is conformity. Even a dead fish can go with the flow.”—Jim Hightower
“To see the right and not to do it is cowardice.”–Confucius
So if impeachment simply isn’t an option, because those in Congress are afraid of losing their jobs because they might actually DO their jobs, then why bother with the ongoing investigations of the weaponizing of the IRS, of Benghazi, and of Fast and Furious? Seriously. If you’re willing to let an Executive usurp your power with his pen and his phone without lawful and rightful consequence provided for in the Constitution, then why pretend that anything else done by government on his behalf (and likely at his behest) is of any consequence?
And if we have so many of our “countrymen” willing to clap and cheer an Executive all but DARING Congress to publicly wallow in it’s impotence in the face of this brazen flouting of our most basic law, do we really have a common ground with those who willingly trade their sovereignty and lawful authority for a despot bearing “gifts” paid for by others?
Seriously, if Congress is willing to neuter itself in order to avoid a confrontation over whether we are going to be a nation of laws or a nation of [small, petty, vindictive] “men”, then the coup is complete, and every day that passes in which no one in authority is willing to publicly pronounce this brings us closer to the purge which must inevitably follow. And if we can expect no courage now from the ones we have elected to be our voices, we have no right to expect any from our neighbors on that black day.
One can only hope that the deepest, darkest, hottest reaches of Hell are reserved for those who could have taken a stand, and instead decided that they only needed to be courageous as soon as we elected enough others like them, for the future of freedom itself rested upon their slight shoulders, and either by a lack of character, or just weak ones, they shrugged.
Taxes, Stupidity, and Death 
I think there is a (small but) real chance Congress will at least put a motion in for impeachment. It may even “charge” him (or them perhaps) with legitimate transgressions, and not some sort of “after the fact” issue. Yeah I know, for example, “purgery” or “obstruction of justice” are valid points. But when you have, as you note above, so many more egregious issues, issues demanding a much stronger sentence be carried out, should the perp(s) be found guilty…those two examples would be insulting to the whole process, and to the American people at large.
Anyhow… yeah the House may very will make/take the first step….the real question is, will the Senate follow up? And there I have to say…not a chance.
One side is far too directly involved in all the goings on, and the other side has such a lack of testicular fortitude, that they could legitimately claim to be the most Eunuch Senate Republicans ever!