Inside the marriage of Sen. Mitch McConnell and his wife, former Transportation Secretary Elaine Chao

Republican Sen. Mitch McConnell and his wife, former Transportation Secretary Elaine Chao.

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Republican Sen. Mitch McConnell has been hospitalized for nearly four weeks, with few details available about his health, prompting growing questions about his condition and what members of his inner circle, including his wife, Elaine Chao, have been told.McConnell and Chao met through a mutual friend and wed in a private Capitol ceremony in 1993, and became a GOP power couple.McConnell has served as a US senator for over 40 years. Chao made history as the first Asian American woman to serve in a presidential Cabinet after she was confirmed as secretary of labor in 2001, during George W. Bush's administration. In President Donald Trump's first term, Chao was appointed transportation secretary.McConnell's Senate office did not immediately respond to a request for comment from Business Insider.Here's a look at their relationship timeline.

Mitch McConnell, 84, is one of the longest-serving lawmakers in the Senate.

Mitch McConnell.