Wrong. The Tea Party movement has decimated the Republican party. Remember, Democrats had less than 20 governors during Clinton's last two years and Bush's first two.
And they have less than 20 now...
That's my point. Having less that 20 governors is far from having your party "decimated." And while the GOP may be nearing its House ceiling, it's still far from having a similar majority in the Senate (partially due to the Tea Party costing us winnable races in 2010 and 2012). Our Senate majority isn't even as large as the one we had in 2005-06.