The Tea Party this the Tea Party that in 2008 before the Tea Party came into being John McCain a pretty moderate Republican lost in 2012 Mitt Romney also a pretty moderate Republican who did not have major Tea Party backing lost also in 2008 before the Tea Party the Republicans lost big in the House and Senate in 2010 when the Tea Party was formed they took back the House and made big gains in the Senate they had some set backs in 2012 and they do need to do a better job in who they nominate for office but you don't get it all down in two years which is how long the Tea Party has existed. Finally here is something for the left to consider if the Tea Party is such a determent why did it have such success in 2010 and why weren't the Democrats able to make bigger gains in the House and Senate this year.
Nothing to consider, usually but not always, the opposition party to the president has an advantage in the mid-terms. Nothing magical about the tea party, the lobbyist money was just spectacularly successful that year, last time we fall for that trick for another generation.