On Tuesday night, such caution and calmness appeared to have paid off, as John Kasich halted Donald Trump in his desire to secure a clean sweep in the five primaries when he won his home state of Ohio.
Tweeted Clinton, Florida, North Carolina, Ohio, Illinois, Missouri: We did it. And together, were going to win this nomination.
Florida is the biggest delegate prize of the night for both parties.
"We are all very, very happy", Kasich told CNN's Wolf Blitzer in a telephone interview. That leaves Kasich as the last true establishment candidate running against Trump and arch-conservative Texas Sen. "To win the states we won, and with the margins".
Even House Speaker Paul Ryan, R-Wis., did not rule out the idea of being drafted by the party at the convention. The result could be a contested convention, creating an unpredictable outcome. "I'm representing many, many millions of people". "We'll see. Who knows?" Kasich was declared victor in OH, but has not won another state so far.
Jennifer Duffy of the nonpartisan Cook Political Report said while Kasich winning enough delegates in the remaining contests is "off the table", Tuesday's win "keeps him out there campaigning".
Clinton and Trump emerged as victors in the elections, and Marco Rubio (R-Fla.) dropped out of the race for the Republican nominee. "He ran a strong optimistic campaign", Cruz said. Trump did not name any.
Clinton has held a commanding lead in Florida polls leading up to the primary, but OH could present more of a challenge for the former USA senator from New York: She averaged an 8 percentage point lead over Sanders in recent surveys there, according to RealClearPolitics. "We're going to have great victories for our country". "We can't lose what made America great in the first place".
Clinton and Trump likely to win Missouri primary by narrow margins
Trump, the 69-year-old billionaire businessman, was aiming to knock out his two mainstream rivals, Rubio and Kasich, but the latter survived with his win in Ohio.
Hours after Rubio suspended his campaign, Cruz encouraged Rubio's supporters to join his campaign.
Trump also won in IL, but it is not yet clear how the state's delegates will be split, as the count is carried out at the congressional district level. "To those who supported Marco, who worked so hard, we welcome you with open arms". The first-term senator, had positioned himself as the only person who could stop Trump.
Clinton started her evening with a 200 delegate lead and ended the evening with a 300 delegate lead. Sanders has at least 800.
A Democratic candidate needs to win 2,383 delegates in order to become the presidential hopeful. Trump has said all along he'll win Florida, but there is mixed reaction in Palm Beach, where he'll finish out the day as results rolls in. Ted Cruz in the delegate race. Meanwhile Illinois offers 156 delegates, OH 143 and North Carolina 107. He also took IL and North Carolina while Missouri was a virtual tie with Ted Cruz.
Cruz, who was unable to score a win, claimed that the Republican primary race was not yet over and that he could overtake the delegate count of Trump.