Answer:
Republican Party
Step-by-step explanation:
Over time, it has been observed that unlike Democratic Party which tends to favor regulation of business, Republican party in which most of its members and supporters are considered to be conservative in nature, have in the past through their policies of governance favored less involvement style, whereby they are less likely to regulate things or commodities of economic value.
Hence, the political party that tends to vote in favor of deregulating business is REPUBLICAN PARTY.