If there's an objection from one congress member and one senator against any state electoral count, the joint body has to go back to its chamber to debate for 2 hours whether that state vote is legitimate and which set of electors is the proper electors.
朱利安尼详解1月6日流程P2：若各有一名众议员和参议员反对选举人票结果的话，两院议员则需回到各自的议院针对该州的选票是否合法、哪一组选举人才是正当选举人进行2小时的辩论