I am building content for an email and need to have a table that contains only images be responsive and resize accordingly. The code works well in Firefox but Chrome, Iphone 6 email client and others add whitespace in the table row/cell during the resize. If I set the height on the images to 100% there is no whitespace on resize but aspect ratio is poor on resize. Any ideas on how to fix?
<table border='0' cellpadding='0' cellspacing='0' width='100%' style='border-collapse:collapse;'>
<tr>
<td align='center'>
<table border='0' cellpadding='0' cellspacing='0' style='border-collapse:collapse;'>
<tr>
<td colspan='3'><img src='http://image.s6.exacttarget.com/lib/fe9312727666017870/m/1/__top.png' style='display:block; width:100%;'></td>
</tr>
<tr>
<td rowspan='2'><img src='http://image.s6.exacttarget.com/lib/fe9312727666017870/m/1/middle_left.png' style='display:block; width:100%;'></td>
<td>
<table border='0' cellpadding='0' cellspacing='0' style='border-collapse:collapse;'>
<tr>
<td colspan=2><img src='http://image.s6.exacttarget.com/lib/fe9312727666017870/m/1/question1_a.png' style='display:block; width:100%; '></td>
</tr>
<tr>
<td><img src='http://image.s6.exacttarget.com/lib/fe9312727666017870/m/1/answer1_a.png' style='display:block; width:100%; '></td>
<td><img src='http://image.s6.exacttarget.com/lib/fe9312727666017870/m/1/answer2_a.png' style='display:block; width:100%;'></td>
</tr>
<tr>
<td colspan=2><img src='http://image.s6.exacttarget.com/lib/fe9312727666017870/m/1/answer3_a.png' style='display:block; width:100%;'></td>
</tr>
</table>
</td>
<td rowspan='2'><img src='http://image.s6.exacttarget.com/lib/fe9312727666017870/m/1/middle_right.png' style='display:block; width:100%;'></td>
</tr>
<tr>
<td><img src='http://image.s6.exacttarget.com/lib/fe9312727666017870/m/1/bottom.png' style='display:block; width:100%;'></td>
</tr>
</table>
</td>
</tr>
</table>