Like many Americans, I have many issues with mr trump. But I have three specific things I wanted to call to your attention.
All of these fall squarely under checks and balances and you can and very well should be working on American interests, rather than your own self interests or that of your party.
(1) the Russian influence issue. Congress abandoned their work and claimed no collusion. In the public, given the testimony we have seen, and the revelations from assorted agencies and the media we can clearly see this is not accurate. I urge you to keep fighting for answers on the senate intelligence committee - specifically, we all heard Russia targeted you, so this is crucial to our democracy.
I also can not state this strongly enough: the mueller probe must be allowed to continue unfettered and you must protect it from the whims of mr trump. If it turns out there was no actual, illegal collusion so be it. But we deserve to know.
(2) mr trump has said himself that he fired mr Comey, and now mr McCabe for purely political reasons and to protect himself from further inquiry. This would seem to this layman to be a case of obstruction of justice. You have the power to hold him accountable. You must exercise that power.
And (3) in his revolving door of White House staff and cabinet members, mr trump appears to be leaving much to chance. The people around him should be helping manage the many things in his purveyance. But he's taking a lot on himself and appears inept at doing so.
The larger problem is with his Secretary of State. In firing mr tillerson, he has now - reportedly - inserted his daughter into the role. She has no security clearance. She has no specific position. She has no skills, and relies on somewhat warped sense of nepotistic entitlement. And she was never vetted or confirmed by the senate to represent the United States in any such capacity.
It is incumbent on you to reign him in.
Checks and balances, Senator. I call on you to provide the check. And it must be done with haste.