If Pelosi doesn't send articles of impeachment to Senate, thereby preventing the Senate from performing it's Constitutional duty to conduct a trial, is that obstruction of Congress?
It's never happened before with an impeachment. Well, it has, once. A judge was impeached by the House, and before they could get the Articles of Impeachment to the Senate, he quit, thereby rendering moot any trial in the Senate. So they never forwarded the Articles to the Senate.
A lot of experts (you know, experts, people who used to be perts) are going to argue a lot of different things, and they all are going to think they're right, and they will all be right and wrong at the same time. SCOTUS will get involved and settle a dispute
between the other two branches of government, because that's what they're there for, but I guarantee you they will be loath to get involved in a political squabble within one of the other branches.
The Constitution plainly states that the sole responsibility for impeachment lies within the House, and it doesn't tell the House how to go about it. Same thing with the Senate having the sole responsibility for the impeachment trial. Which means, the Senate cannot tell the House how to conduct an impeachment any more than the House can tell the Senate how to conduct a trial (I'm looking at you, Nancy). If the House decides not to submit the Articles of Impeachment to the Senate, there's nothing the Senate can do about it. And there's nothing SCOTUS can do about it, either. The only people outside of those in the House who can do anything about it are
We The People at the ballot box in November.
The Democrats just got
>owned< by the Mueller Report. All of their hopes and dreams and fantasies came crashing down upon them. Even though it's pretty clear that the Russian Collusion hoax was cooked up by Democrat operatives as a way to demonize the GOP, and entrench their power, when Trump actually won they had to go all-in with collusion. Before the election there were rumors and half-baked accusations (Putin's puppet!) but when Trump won, collusion with Russia to steal the election became the only palatable, thus viable, explanation. So when the Mueller Report turned up nothing, despite having a small army of pro-Hillary/anti-Trump investigators looking for something, anything, any kind of crime to hang Trump with, the Dems panicked and freaked out.
They dragged poor Admiral Stockdale, er, I mean, Robert Mueller in front of Congress and grilled him for some little juicy nugget they could use against Trump, which backfired spectacularly. They had to come up with something else. They knew that a whistleblower could effectively remain anonymous, if the information the whistleblower provided was deemed credible, and you could act on the information alone without having the whistleblower verify what was already deemed credible. So Adam Schiff and a couple of Democratic operatives cooked up the Quid Pro Quo Call (the whistleblower recently left the NSC to go back to the CIA, and his best bud also just left the NSC to join Adam Schiff's staff, but I'm sure that's all just coincidence). They thought they had him, finally! Trump can't question the whistleblower, because we have to go with the information alone provided by the whistleblower.
Nancy took her rightful position in the Crow's Nest of the Titanic, raised her sword, and shouted, "Full steam ahead! Begin the Impeachment Inquiry!"
Then Trump released the transcript of the call.
And the Democrats took a collective crap.
So they got nothing, they know they got nothing, and they know they've gotta find something, anything, and it needs to be
Must See TV.
The paraded out a mountain of evidentiary witnesses, all of whom hate Trump, and all of whom gave witness to their personal opinion of how orange, and how bad, the man is. Schiff did not allow the Republicans to call witnesses. And the only fact that came out of all of that testimony was when Ambassador Sondland stated that Trump told him directly that he didn't want anything in exchange for the investigations of the Bidens.
Must See TV quickly became
Must Change the Channel TV.
They couldn't find it within themselves to just stop, table everything, take 2 steps back, and admit crushing defeat. Nope. They powered on, charging into the Valley of Death rode the 229.
At this point, being the good and faithful Catholic she purports to be, Nancy Pelosi is left with a Hail Mary. She's going to hold onto the Articles of Impeachment and ironocally keep saying over and over and over again that the Republican's are refusing to be fair and call witnesses the Democrats want to hear from, hoping that if it gets repeated long enough and for enough times that the public will believe it. The alternative is for her to hand the Articles of Impeachment over to Mitch McConnell and have to stand there and watch him do the Happy Dance.