Jenna Bush could have chosen to get married in the White House. A wedding in the White House, by its very nature, would have been a 'high profile wedding'!
Instead, Jenna chose to have a significantly smaller wedding at the family ranch in Texas. Compared to what she could have had at the White House, the Texas wedding was considered 'low key'; only a small group of close family members and friends were invited to attend.
'Low key' would be the opposite of 'high profile'.
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