Lucy is not pulling the ball away. If you want a football metaphor here it is of the Trump team moving the goalposts constantly to compensate for every series of lies that get uncovered.
First there was not contact with any Russians. Then there was contact but it had nothing to do with the campaign. Then it had to do with the campaign but did not involve anything to with colluding to get dirt on Hillary Clinton. Then it was about colluding to get dirt on Hillary Clinton but supposedly all that is perfectly legal.
As we’ve discovered, all those lies along the way were definitely not legal. Any suggestion the Mueller investigation is moving slowly is false. By the standards of the investigations into Clinton and Nixon it is moving at light speed.