I had already put "text-align: left;" in every entry where it says blockquote, but it didn't affect the blockquotes.
This is what I have:
.entry blockquote { font-size: 1.0em; text-align:left; }
.entry blockquote.right { width: 200px; font-style: normal !important; font-size: 1.3em !important; margin: 0.3em 0 0.3em 15px !important; padding: 0.3em 0 !important; border: 3px double #aaa; border-width: 3px 0; text-align:left; float: right; }
.entry blockquote.left { width: 200px; font-style: normal !important; font-size: 1.3em !important; margin: 0.3em 15px 0.3em 0 !important; padding: 0.3em 0 !important; border: 3px double #aaa; border-width: 3px 0; text-align:left; float: left; }
.entry blockquote.right p, .entry blockquote.left p { margin: 0 !important; line-height: 1.4em !important; text-align:left;}
.entry p { margin: 0 0 1.5em 0; text-align:left;}