First is the whole US Attorney non-scandal. The Constitution says in Article 2, Section 2:
The President shall nominate, and by and with the Advice and Consent of the Senate, shall appoint Ambassadors, other public Ministers and Consuls, Judges of the supreme Court, and all other Officers of the United States, whose Appointments are not herein otherwise provided for
The President has the right to fire anyone he appoints for any reason he chooses, even political ones. If they don't want him to have the power to do that for US Attorneys then they need to amend the Constitution to lay out the process of appointing them. Good luck with that. They know they could never pass that, so instead they will try and subvert the Constitutional separation of powers and demand who can and can't be fired. Intersting how they didn't care this much when Rumsfeld "resigned" for political reasons.
The next issue is DC getting a vote in Congress. Let's read the Constitution, Article 1, Section 2:
The House of Representatives shall be composed of Members chosen every second Year by the People of the several STATES
DC is not a state. Therefore it gets no vote in Congress. If the Libs believe they should then the process is to amend the Constitution. Oh wait...they tried that and it failed. So, instead of obeying the Constitution they think they can just re-write it to fit there desires being they know that a DC vote means one extra vote for them as DC votes nearly 90% Democrat.
And finally and the most dangerous of all is the Dems complete lack of respect for the President's Constitutional role as Commander in Chief. The only power Congress has is to approve military actions, which it did, and the power of the purse. However, being they know that if tried to cut off the funds like the wacky left wants, they wouldn't stand a chance, so instead they once again overstep their Constitutional authority and put a deadline for the President to remove troops. Even that they were only barely able to do that, 118-112 due to blackmailing Members by sending over $20 billion dollars in pork to districts in exchange for their vote. We have just become less safe, the enemy is emboldened further, and the Iraqi citizens will have even more reasons to not help us for fear of reprisals when we leave.