A former aide to President George W. Bush has announced she will support Democratic nominee Hillary Clinton over Donald Trump for president.

"Our nation faces a unique set of challenges that require steady and experienced leadership," Lezlee Westine, who served as the Bush administration's White House director of Public Liaison and deputy assistant to the president, said in a Monday statement, according to the Washington Post.

Westine, a Republican, is now the president and chief executive of the Personal Care Products Council.

"That is why today I am personally supporting Hillary Clinton. She has the expertise and commitment to American values to grow the economy, create jobs and protect America at home and abroad," her statement added.

Westine did not elaborate on why she would not support Trump. She now joins a growing list of conservatives in a variety of spheres that have declared their support of Clinton.

"It might not be entirely clear that Hillary Clinton deserves to win the presidency, but it is thunderingly clear that Donald Trump deserves to lose," Frank Lavin, a former political director for President Reagan, wrote in an op-ed Saturday in support of Clinton over Trump.

Some lawmakers have come out against Trump as well, including Rep. Richard Hanna, D-N.Y.