COLUMBIA, S.C. — Emboldened by her South Carolina landslide, Hillary Clinton is shifting her focus to Republican front-runner Donald Trump as her party seeks consensus on the best ways to challenge the billionaire’s unpredictable nature in a general election.

As Clinton enters the series of Super Tuesday contests this week, allies of the former secretary of state, unaffiliated Democratic strategists and the national party are stockpiling potential ammunition about Trump, reviewing reams of court filings, requesting information about his business dealings from state governments and conducting new polls to test lines of attack.

Among the likely options: Questioning Trump’s qualifications and temperament to be president, scrutinizing his business practices and bankruptcy filings, and re-airing his inflammatory statements about women and minorities who will be central to the Democrats’ efforts in November.

“Is this the guy you would trust with the nuclear codes? Is this the guy you would trust with your son or daughter in the military? Is this the guy you would trust to run the economy?” asked Gov. Dan Malloy of Connecticut, a Clinton backer, pointing to a likely argument from Democrats.

While party leaders see Clinton in a favorable position against Trump, they caution that the real estate mogul has shown a mastery of the media and an ability to stay on offense throughout the GOP primaries. And they acknowledge Trump has successfully tapped into a deep vein of economic insecurity running through the electorate.