Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Office of the United States Nuclear Waste Negotiator
Table title:
United States Nuclear Waste Negotiators
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Name </th><th colspan=1 rowspan=1 > State of Residence </th><th colspan=1 rowspan=1 > Date appointed </th><th colspan=1 rowspan=1 > President(s) served under </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > David H. Leroy </td><td colspan=1 rowspan=1 > Idaho </td><td colspan=1 rowspan=1 > 1990 </td><td colspan=1 rowspan=1 > George H. W. Bush </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Richard H. Stallings </td><td class="highlighted"  colspan=1 rowspan=1 > Idaho </td><td class="highlighted"  colspan=1 rowspan=1 > 1993 </td><td class="highlighted"  colspan=1 rowspan=1 > Bill Clinton </td></tr>
</table>
Question:
Who replaced David Leroy in 1993?
Answer:
In 1993 President Bill Clinton replaced Leroy with Richard H. Stallings, from Idaho.