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:
List of ambassadors of the United States to Cambodia
Table title:
Ambassadors
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Name </th><th colspan=1 rowspan=1 > Portrait </th><th colspan=1 rowspan=1 > Appointed </th><th colspan=1 rowspan=1 > Presentation of Credentials </th><th colspan=1 rowspan=1 > Termination of Mission </th><th colspan=1 rowspan=1 > President </th></tr>
<tr> <td colspan=1 rowspan=2 > Donald R. Heath </td><td colspan=1 rowspan=2 > - </td><td colspan=1 rowspan=2 > June 29, 1950 </td><td colspan=1 rowspan=2 > July 11, 1950 </td><td colspan=1 rowspan=2 > October 2, 1954 </td><td colspan=1 rowspan=1 > Harry S. Truman </td></tr>
<tr> <td colspan=1 rowspan=1 > Dwight D. Eisenhower </td></tr>
<tr> <td colspan=1 rowspan=1 > Robert McClintock </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > August 18, 1954 </td><td colspan=1 rowspan=1 > October 2, 1954 </td><td colspan=1 rowspan=1 > October 15, 1956 </td><td colspan=1 rowspan=2 > Dwight D. Eisenhower </td></tr>
<tr> <td colspan=1 rowspan=1 > Carl W. Strom </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > October 11, 1956 </td><td colspan=1 rowspan=1 > December 7, 1956 </td><td colspan=1 rowspan=1 > March 8, 1959 </td></tr>
<tr> <td colspan=1 rowspan=2 > William C. Trimble </td><td colspan=1 rowspan=2 > - </td><td colspan=1 rowspan=2 > February 16, 1959 </td><td colspan=1 rowspan=2 > April 23, 1959 </td><td colspan=1 rowspan=2 > June 8, 1962 </td><td colspan=1 rowspan=1 > Dwight D. Eisenhower </td></tr>
<tr> <td colspan=1 rowspan=1 > John F. Kennedy </td></tr>
<tr> <td colspan=1 rowspan=2 > Philip D. Sprouse </td><td colspan=1 rowspan=2 > - </td><td colspan=1 rowspan=2 > June 28, 1962 </td><td colspan=1 rowspan=2 > August 20, 1962 </td><td colspan=1 rowspan=2 > March 3, 1964 </td><td colspan=1 rowspan=1 > John F. Kennedy </td></tr>
<tr> <td colspan=1 rowspan=1 > Lyndon B. Johnson </td></tr>
<tr> <td colspan=1 rowspan=1 > Randolph A. Kidder </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > July 9, 1964 </td><td colspan=1 rowspan=1 > Did not present credentials </td><td colspan=1 rowspan=1 > September 18, 1964 </td><td colspan=1 rowspan=1 > Lyndon B. Johnson </td></tr>
<tr> <td colspan=15 rowspan=1 > Office vacant from 1964 to 1970. </td></tr>
<tr> <td colspan=1 rowspan=1 > Emory C. Swank </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > September 3, 1970 </td><td colspan=1 rowspan=1 > September 15, 1970 </td><td colspan=1 rowspan=1 > September 5, 1973 </td><td colspan=1 rowspan=2 > Richard Nixon </td></tr>
<tr> <td colspan=1 rowspan=2 > John Gunther Dean </td><td colspan=1 rowspan=2 > - </td><td colspan=1 rowspan=2 > March 14, 1974 </td><td colspan=1 rowspan=2 > April 3, 1974 </td><td colspan=1 rowspan=2 > April 12, 1975 </td></tr>
<tr> <td colspan=1 rowspan=1 > Gerald Ford </td></tr>
<tr> <td colspan=15 rowspan=1 > Office vacant from 1975 to 1994. </td></tr>
<tr> <td colspan=1 rowspan=1 > Charles H. Twining </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > May 13, 1994 </td><td colspan=1 rowspan=1 > May 17, 1994 </td><td colspan=1 rowspan=1 > November 20, 1995 </td><td colspan=1 rowspan=3 > Bill Clinton </td></tr>
<tr> <td colspan=1 rowspan=1 > Kenneth M. Quinn </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > December 12, 1995 </td><td colspan=1 rowspan=1 > March 28, 1996 </td><td colspan=1 rowspan=1 > July 25, 1999 </td></tr>
<tr> <td colspan=1 rowspan=2 > Kent M. Wiedemann </td><td colspan=1 rowspan=2 > - </td><td colspan=1 rowspan=2 > June 7, 1999 </td><td colspan=1 rowspan=2 > August 31, 1999 </td><td colspan=1 rowspan=2 > May 16, 2002 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=4 > George W. Bush </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Charles A. Ray </td><td colspan=1 rowspan=1 > Charles A Ray ambassador.JPG </td><td colspan=1 rowspan=1 > November 15, 2002 </td><td colspan=1 rowspan=1 > January 4, 2003 </td><td colspan=1 rowspan=1 > July 11, 2005 </td></tr>
<tr> <td colspan=1 rowspan=1 > Joseph A. Mussomeli </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > June 27, 2005 </td><td colspan=1 rowspan=1 > September 22, 2005 </td><td colspan=1 rowspan=1 > August 2008 </td></tr>
<tr> <td colspan=1 rowspan=2 > Carol A. Rodley </td><td colspan=1 rowspan=2 > - </td><td colspan=1 rowspan=2 > October 24, 2008 </td><td colspan=1 rowspan=2 > January 20, 2009 </td><td colspan=1 rowspan=2 > September 29, 2011 </td></tr>
<tr> <td colspan=1 rowspan=3 > Barack Obama </td></tr>
<tr> <td colspan=1 rowspan=1 > William E. Todd </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > April 2, 2012 </td><td colspan=1 rowspan=1 > June 8, 2012 </td><td colspan=1 rowspan=1 > August 14, 2015 </td></tr>
<tr> <td colspan=1 rowspan=2 > William A. Heidt </td><td colspan=1 rowspan=2 > - </td><td colspan=1 rowspan=2 > September 14, 2015 </td><td colspan=1 rowspan=2 > December 2, 2015 </td><td colspan=1 rowspan=2 > November 28, 2018 </td></tr>
<tr> <td colspan=1 rowspan=2 > Donald Trump </td></tr>
</table>
Question:
Who did President George W. Bush appoint as ambassador for Cambodia?
Answer:
President George W. Bush appointed Ray as an Ambassador to Cambodia.