Even if Menendez is convicted, he doesn't have to resign. He could stay in office until Christie is out of  office in January. The only way to get him out would be for the senate to expel him and that takes a 2/3rds vote. Democrats will invoke the McConnell Rule, and say Christie shouldn't get to fill the vacancy during his last months in office and we should let the voters decide. Christie is so unpopular, it's unlikely that a Republican will succeed him. 

So your only strategy is waiting for Senator McCain to die, and that's not a very good one. Other Republicans may emerge who will vote against ACA repeal if their vote is actually needed. Recall that opening ANWR passed during the Clinton administration and he vetoed it. When it came up for a vote during the W. Bush administration, many Republicans switched their vote to NO, because they knew he would sign it.