Coming off an important primary win in Michigan, the stakes were high for Democratic presidential candidate Bernie Sanders as he sparred with rival Hillary Clinton in Miami Wednesday night. In the fourth one-on-one debate, Clinton and Sanders were asked about immigration reform, Republican front-runner Donald Trump's racially charged language and their leadership styles.

Sanders used the Wednesday night debate to again try to differentiate himself from Clinton, painting her as a Washington insider who has not stood up to political interests, including big banks, and labeling himself as the candidate Wall Street is most scared of. Clinton admitted to not being a natural politician, unlike her husband former President Bill Clinton, but highlighted her years of experience as both a senator and secretary of state.

The moderators asked pointed questions of both candidates on whether they would deport undocumented child immigrants, with both Clinton and Sanders pledging they would not. Sanders, whose own father was an immigrant from Poland, will need the help of Latino voters in Florida if is he to win the Sunshine State, while Clinton was asked by moderator Maria Elena Salinas whether she was "hispandering," or pandering to Hispanic to voters. Polls ahead of the Florida primary have Clinton leading with an average of 60 percent support compared with Sanders’ 31 percent.

After what the Clinton campaign labelled as a “close loss” in Michigan, both candidates are looking ahead to the March 15 races in Florida and Ohio, key battleground states for the general election, as well as Illinois, Missouri and North Carolina.

Here are some key video clips of Wednesday night’s debate including the most applauded moments, gaffes, zingers and takedowns:

When asked about her use of a private email server, Clinton admitted to making a mistake. She said she did not send or receive any emails marked classified at the time, noting the emails were marked classified retroactively.

“It’s not going to happen,” Clinton said when moderator Jorge Ramos asked about the possibility of her dropping out of the race if she is indicted.

Immigration was a key topic with both Clinton and Sanders promising they would not deport undocumented children. Clinton poked fun at Republican front-runner Donald Trump's call for a large and tall wall to be built along the U.S.-Mexican border, describing it as a "fantasy."

Sanders went after Clinton, saying sarcastically that her words had "intimidated Wall Street" and claiming she had received over $15 million in campaign donations. Brandishing his credentials as someone who will stand up to vested interests,  Sanders said the head of investment bank Goldman Sachs called him "dangerous." He also used his catch phrase "yuge," during the debate.

Clinton admitted during the debate her husband, former President Bill Clinton, was a more natural politician.

After displaying a feistier and more urgent than normal tone in the last Democratic debate with a finger wag and “Excuse me, I’m talking” line, Sanders again sought to shake Clinton, but instead she employed similar language.