Linear Regression Relating Incumbency and Q2 GDP Growth Rate with Incumbent Party Two-Party Vote Share
term	estimate	std.error	statistic	p.value
(Intercept)	48.475992	2.152737	22.5183034	2.142374e-12
gdp_growth_qt	1.197511	1.945322	0.6155851	5.480459e-01
incumbentTRUE	2.064453	2.708879	0.7621060	4.586445e-01
gdp_growth_qt:incumbentTRUE	2.187873	2.263126	0.9667484	3.500744e-01