Donald Trump is preparing for a scenario in which he will be unable to attend the Republican National Convention, a decision influenced in part by the possibility that he could be sentenced to home confinement after his historic conviction late last month. 

Preparations are being made at both Mar-a-Lago, his home in Florida, and in Milwaukee, the host city for the convention next month, should Trump either choose to make appearances from afar or be unable to attend, according to two sources…