From the Wapo:
The push by Trump and his personal attorney, Rudolph W. Giuliani, to influence the newly elected Ukrainian leader reveals a president convinced of his own invincibility — apparently willing and even eager to wield the vast powers of the United States to taint a political foe and confident that no one could hold him back.
“We haven’t seen anything like this in my lifetime,” said William A. Galston, a senior fellow in governance at the Brookings Institution who graduated from college just before Watergate. “He appears to be daring the rest of the political system to stop him — and if it doesn’t, he’ll go further.”