Let's see, it takes a simple majority vote for the House of Representatives to Impeach a President.  There are 435 of them so a majority would be 221.  Right now, 246 of them are Republicans and no one is predicting a loss of 25 seats to the Democrats  this November.  Sucker bet on impeachment if the House (you know, the people who have voted 60 separate times to repeal all or part of Obamacare) decides to do it.

If the House hates Hillary as much as they do Obama, it isn't impossible.

Now conviction in the Senate of whatever the House Bill of Impeachment charges Hillary with (totally political, of course) takes a 2/3 vote.  Right now the Republicans only have 54 of the 100 Senators so they would need to get 13 Democrats to convict and remove her.   Fifty senators voted to remove Bill Clinton on his obstruction of justice charge and 45 voted to remove him on the perjury charge; no Democrat voted guilty on either charge.  I would expect a similar result if Hillary is impeached.