Nah. that's not the way politics works. By the time someone is forced to initiate an investigation considerable time will pass. Then there will be months of depositions, meetings, etc. By that time there'll be another general election, and it doesn't matter much whether El Presidente gets ousted or not; it's traditional to rotate the high level appointments to the next group of Party flacks after an election anyway. So the investigation will be "someone else's problem" in that it didn't happen during the time of anyone who will be heading the DOJ at that time, and it will be given minimum priority.
Given that media attention seldom lasts more than a few weeks, all they really have to do is drag their feet that long, put it on the back burner, and then in two or three years enough of Congress will have gone through elections that they can safely roundfile the matter without worrying if it might come back on them.
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