Complex sentence: During Levitt's tenure at the SEC, he was widely viewed as a pro-investor advocate and received favorable press coverage; however, more recently he has come under criticism for failing to act against 1990s bull market abuses.
Split into simpler sentences: During Levitt's tenure at the SEC, he was widely viewed as a pro-investor advocate and received favorable press coverage. However, more recently he has come under criticism for failing to act against 1990s bull market abuses.