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• "The question is how quickly does the party unite around Mike Rounds?" said Jon Schaff, a political science professor at Northern State University.
• Nelson repeatedly dogged Rounds during the campaign, accusing the former governor of increasing state government spending, supporting a federal immigration visa program that resulted in a bankrupt beef plant and taking too much special interest money from out-of-state supporters.
• Nelson said he and Rounds have "significant ideological differences" that led to him jumping in the race.
• "Just because he was able to pour millions of dollars in East Coast special interest money into the race to buy it doesn't mean I can support him now," Nelson said.
• The South Dakota U.S. Senate race is one Republicans believe they have a good chance to win because President Barack Obama lost the state badly in the 2012 election. Republicans need to make a net gain of six seats to take over the majority in the U.S. Senate.
• In South Dakota's gubernatorial race, Republican Gov. Dennis Daugaard easily fought off a challenge from former state Rep. Lora Hubbel. On the Democratic side, state Rep. Susan Wismer of Britton topped former state wildfire agency head Joe Lowe.
• Rounds, 59, moves on to the Nov. 4 general election to face Democratic business owner Rick Weiland and the two independents.
• Weiland, a former aide to U.S. Sen. Tom Daschle, has built a strong grassroots campaign reminiscent of his former boss. But the 55-year-old Sioux Falls restaurant owner hasn't been able to match Rounds' fundraising. Weiland has collected about $733,000 in contributions compared to $2.8 million for Rounds, according to the most recent Federal Election Commission reports.
• Pressler, who describes himself a "passionate centrist," served two terms in the House followed by three Senate terms from 1975 to 1997. The 72-year-old Pressler has struggled to raise money but could steal both Democratic and Republican votes, Schaff said.
• Howie, 64, served in the Legislature between 2005 and 2010. He entered the race as an independent in April but said he was supporting Nelson in the Republican primary and would drop out of the race if Nelson won the GOP nomination.
• Rhoden, who finished second with more than 18 percent of the Republican primary vote, said he's not yet ready to announce who he'll support in November.
• "Tonight I'm focused on the people who came here to support me and expressing my gratitude to those folks," he said.
• Nelson, who collected just shy of 18 percent of the vote to finish third, said Howie

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